diff --git a/src/block/Block.php b/src/block/Block.php
index 2022a55be..dae39760f 100644
--- a/src/block/Block.php
+++ b/src/block/Block.php
@@ -536,9 +536,12 @@ class Block{
 	/**
 	 * Called when an entity's bounding box clips inside this block's cell. Note that the entity may not be intersecting
 	 * with the collision box or bounding box.
+	 *
+	 * @return bool Whether the block is still the same after the intersection. If it changed (e.g. due to an explosive
+	 * being ignited), this should return false.
 	 */
-	public function onEntityInside(Entity $entity) : void{
-
+	public function onEntityInside(Entity $entity) : bool{
+		return true;
 	}
 
 	/**
diff --git a/src/block/Cactus.php b/src/block/Cactus.php
index 951666623..6a24b8c2e 100644
--- a/src/block/Cactus.php
+++ b/src/block/Cactus.php
@@ -68,9 +68,10 @@ class Cactus extends Transparent{
 		return [AxisAlignedBB::one()->contract($shrinkSize, 0, $shrinkSize)->trim(Facing::UP, $shrinkSize)];
 	}
 
-	public function onEntityInside(Entity $entity) : void{
+	public function onEntityInside(Entity $entity) : bool{
 		$ev = new EntityDamageByBlockEvent($this, $entity, EntityDamageEvent::CAUSE_CONTACT, 1);
 		$entity->attack($ev);
+		return true;
 	}
 
 	public function onNearbyBlockChange() : void{
diff --git a/src/block/Cobweb.php b/src/block/Cobweb.php
index e93641d7d..1f042ed29 100644
--- a/src/block/Cobweb.php
+++ b/src/block/Cobweb.php
@@ -37,8 +37,9 @@ class Cobweb extends Flowable{
 		return true;
 	}
 
-	public function onEntityInside(Entity $entity) : void{
+	public function onEntityInside(Entity $entity) : bool{
 		$entity->resetFallDistance();
+		return true;
 	}
 
 	public function getDropsForCompatibleTool(Item $item) : array{
diff --git a/src/block/Fire.php b/src/block/Fire.php
index c1b019a48..be94f8ab3 100644
--- a/src/block/Fire.php
+++ b/src/block/Fire.php
@@ -68,7 +68,7 @@ class Fire extends Flowable{
 		return true;
 	}
 
-	public function onEntityInside(Entity $entity) : void{
+	public function onEntityInside(Entity $entity) : bool{
 		$ev = new EntityDamageByBlockEvent($this, $entity, EntityDamageEvent::CAUSE_FIRE, 1);
 		$entity->attack($ev);
 
@@ -80,6 +80,7 @@ class Fire extends Flowable{
 		if(!$ev->isCancelled()){
 			$entity->setOnFire($ev->getDuration());
 		}
+		return true;
 	}
 
 	public function getDropsForCompatibleTool(Item $item) : array{
diff --git a/src/block/Ladder.php b/src/block/Ladder.php
index 3ef3f073e..b696d8daa 100644
--- a/src/block/Ladder.php
+++ b/src/block/Ladder.php
@@ -66,11 +66,12 @@ class Ladder extends Transparent{
 		return true;
 	}
 
-	public function onEntityInside(Entity $entity) : void{
+	public function onEntityInside(Entity $entity) : bool{
 		if($entity instanceof Living && $entity->getPosition()->floor()->distanceSquared($this->pos) < 1){ //entity coordinates must be inside block
 			$entity->resetFallDistance();
 			$entity->onGround = true;
 		}
+		return true;
 	}
 
 	/**
diff --git a/src/block/Lava.php b/src/block/Lava.php
index aa1dec075..004049c00 100644
--- a/src/block/Lava.php
+++ b/src/block/Lava.php
@@ -87,7 +87,7 @@ class Lava extends Liquid{
 		}
 	}
 
-	public function onEntityInside(Entity $entity) : void{
+	public function onEntityInside(Entity $entity) : bool{
 		$entity->fallDistance *= 0.5;
 
 		$ev = new EntityDamageByBlockEvent($this, $entity, EntityDamageEvent::CAUSE_LAVA, 4);
@@ -100,5 +100,6 @@ class Lava extends Liquid{
 		}
 
 		$entity->resetFallDistance();
+		return true;
 	}
 }
diff --git a/src/block/Magma.php b/src/block/Magma.php
index d16ae056b..2993e1e6b 100644
--- a/src/block/Magma.php
+++ b/src/block/Magma.php
@@ -43,11 +43,12 @@ class Magma extends Opaque{
 		return true;
 	}
 
-	public function onEntityInside(Entity $entity) : void{
+	public function onEntityInside(Entity $entity) : bool{
 		if($entity instanceof Living and !$entity->isSneaking()){
 			$ev = new EntityDamageByBlockEvent($this, $entity, EntityDamageEvent::CAUSE_FIRE, 1);
 			$entity->attack($ev);
 		}
+		return true;
 	}
 
 	public function burnsForever() : bool{
diff --git a/src/block/NetherPortal.php b/src/block/NetherPortal.php
index c2003958f..70260994a 100644
--- a/src/block/NetherPortal.php
+++ b/src/block/NetherPortal.php
@@ -83,7 +83,8 @@ class NetherPortal extends Transparent{
 		return [];
 	}
 
-	public function onEntityInside(Entity $entity) : void{
+	public function onEntityInside(Entity $entity) : bool{
 		//TODO
+		return true;
 	}
 }
diff --git a/src/block/TNT.php b/src/block/TNT.php
index 201b5c5dc..f9325afd1 100644
--- a/src/block/TNT.php
+++ b/src/block/TNT.php
@@ -83,10 +83,12 @@ class TNT extends Opaque{
 		return true;
 	}
 
-	public function onEntityInside(Entity $entity) : void{
+	public function onEntityInside(Entity $entity) : bool{
 		if($entity instanceof Arrow and $entity->isOnFire()){
 			$this->ignite();
+			return false;
 		}
+		return true;
 	}
 
 	public function ignite(int $fuse = 80) : void{
diff --git a/src/block/Vine.php b/src/block/Vine.php
index ec86d57ab..ac76a81b5 100644
--- a/src/block/Vine.php
+++ b/src/block/Vine.php
@@ -81,8 +81,9 @@ class Vine extends Flowable{
 		return true;
 	}
 
-	public function onEntityInside(Entity $entity) : void{
+	public function onEntityInside(Entity $entity) : bool{
 		$entity->resetFallDistance();
+		return true;
 	}
 
 	protected function recalculateCollisionBoxes() : array{
diff --git a/src/block/Water.php b/src/block/Water.php
index d2d85baad..a516d4064 100644
--- a/src/block/Water.php
+++ b/src/block/Water.php
@@ -46,10 +46,11 @@ class Water extends Liquid{
 		return 5;
 	}
 
-	public function onEntityInside(Entity $entity) : void{
+	public function onEntityInside(Entity $entity) : bool{
 		$entity->resetFallDistance();
 		if($entity->isOnFire()){
 			$entity->extinguish();
 		}
+		return true;
 	}
 }
diff --git a/src/entity/Entity.php b/src/entity/Entity.php
index 550852f40..e855c1b57 100644
--- a/src/entity/Entity.php
+++ b/src/entity/Entity.php
@@ -1279,7 +1279,9 @@ abstract class Entity{
 		$vectors = [];
 
 		foreach($this->getBlocksAround() as $block){
-			$block->onEntityInside($this);
+			if(!$block->onEntityInside($this)){
+				$this->blocksAround = null;
+			}
 			if(($v = $block->addVelocityToEntity($this)) !== null){
 				$vectors[] = $v;
 			}