diff --git a/src/pocketmine/level/Explosion.php b/src/pocketmine/level/Explosion.php
index cead7fc53..aba744dba 100644
--- a/src/pocketmine/level/Explosion.php
+++ b/src/pocketmine/level/Explosion.php
@@ -35,6 +35,7 @@ use pocketmine\event\entity\EntityExplodeEvent;
 use pocketmine\item\Item;
 use pocketmine\item\ItemFactory;
 use pocketmine\level\particle\HugeExplodeSeedParticle;
+use pocketmine\level\utils\SubChunkIteratorManager;
 use pocketmine\math\AxisAlignedBB;
 use pocketmine\math\Math;
 use pocketmine\math\Vector3;
@@ -58,11 +59,16 @@ class Explosion{
 	/** @var Entity|Block */
 	private $what;
 
+	/** @var SubChunkIteratorManager */
+	private $subChunkHandler;
+
 	public function __construct(Position $center, $size, $what = null){
 		$this->level = $center->getLevel();
 		$this->source = $center;
 		$this->size = max($size, 0);
 		$this->what = $what;
+
+		$this->subChunkHandler = new SubChunkIteratorManager($this->level, false);
 	}
 
 	/**
@@ -76,11 +82,6 @@ class Explosion{
 		$vector = new Vector3(0, 0, 0);
 		$vBlock = new Position(0, 0, 0, $this->level);
 
-		$currentX = ((int) $this->source->x) >> 4;
-		$currentZ = ((int) $this->source->z) >> 4;
-
-		$currentSubY = ((int) $this->source->y) >> 4;
-
 		$currentChunk = null;
 		$currentSubChunk = null;
 
@@ -103,33 +104,17 @@ class Explosion{
 							$vBlock->y = $pointerY >= $y ? $y : $y - 1;
 							$vBlock->z = $pointerZ >= $z ? $z : $z - 1;
 
-
-							if($currentChunk === null or ($vBlock->x >> 4) !== $currentX or ($vBlock->z >> 4) !== $currentZ){
-								$currentX = $vBlock->x >> 4;
-								$currentZ = $vBlock->z >> 4;
-								$currentSubChunk = null;
-
-								$currentChunk = $this->level->getChunk($currentX, $currentZ);
-								if($currentChunk === null){
-									continue;
-								}
+							if(!$this->subChunkHandler->moveTo($vBlock->x, $vBlock->y, $vBlock->z)){
+								continue;
 							}
 
-							if($currentSubChunk === null or ($vBlock->y >> 4) !== $currentSubY){
-								$currentSubY = $vBlock->y >> 4;
-								$currentSubChunk = $currentChunk->getSubChunk($currentSubY);
-								if($currentSubChunk === null){
-									continue;
-								}
-							}
-
-							$blockId = $currentSubChunk->getBlockId($vBlock->x & 0x0f, $vBlock->y & 0x0f, $vBlock->z & 0x0f);
+							$blockId = $this->subChunkHandler->currentSubChunk->getBlockId($vBlock->x & 0x0f, $vBlock->y & 0x0f, $vBlock->z & 0x0f);
 
 							if($blockId !== 0){
 								$blastForce -= (BlockFactory::$blastResistance[$blockId] / 5 + 0.3) * $this->stepLen;
 								if($blastForce > 0){
 									if(!isset($this->affectedBlocks[$index = Level::blockHash($vBlock->x, $vBlock->y, $vBlock->z)])){
-										$this->affectedBlocks[$index] = BlockFactory::get($blockId, $currentSubChunk->getBlockData($vBlock->x & 0x0f, $vBlock->y & 0x0f, $vBlock->z & 0x0f), $vBlock);
+										$this->affectedBlocks[$index] = BlockFactory::get($blockId, $this->subChunkHandler->currentSubChunk->getBlockData($vBlock->x & 0x0f, $vBlock->y & 0x0f, $vBlock->z & 0x0f), $vBlock);
 									}
 								}
 							}