diff --git a/BauSystem_19/src/de/steamwar/bausystem/features/simulator/preview/Explosion.java b/BauSystem_19/src/de/steamwar/bausystem/features/simulator/preview/Explosion.java
index 20173ed5..634ffab3 100644
--- a/BauSystem_19/src/de/steamwar/bausystem/features/simulator/preview/Explosion.java
+++ b/BauSystem_19/src/de/steamwar/bausystem/features/simulator/preview/Explosion.java
@@ -194,7 +194,8 @@ public class Explosion {
         int oY = sY > dY ? -1 : 1;
         int oZ = sZ > dZ ? -1 : 1;
         while (true) {
-            if (simulatorData.getBlockType(floor(x), floor(y), floor(z)) != Material.AIR) {
+            Material material = simulatorData.getBlockType(floor(x), floor(y), floor(z));
+            if (material != Material.LAVA && material != Material.WATER && !material.isAir()) {
                 return true;
             }
 
diff --git a/BauSystem_Main/src/de/steamwar/bausystem/features/simulator/preview/PreviewRecord.java b/BauSystem_Main/src/de/steamwar/bausystem/features/simulator/preview/PreviewRecord.java
index 6cdf169e..0075ee05 100644
--- a/BauSystem_Main/src/de/steamwar/bausystem/features/simulator/preview/PreviewRecord.java
+++ b/BauSystem_Main/src/de/steamwar/bausystem/features/simulator/preview/PreviewRecord.java
@@ -54,10 +54,10 @@ public class PreviewRecord {
     }
 
     public void show(Player player) {
+        destroyedBlocks.forEach(vector -> {
+            player.sendBlockChange(vector.toLocation(player.getWorld()), AIR_BLOCK_DATA);
+        });
         showModeMap.computeIfAbsent(player, p -> {
-            destroyedBlocks.forEach(vector -> {
-                p.sendBlockChange(vector.toLocation(player.getWorld()), AIR_BLOCK_DATA);
-            });
             ShowModeParameter showModeParameter = new ShowModeParameter();
             showModeParameter.enableWater();
             showModeParameter.enableCount();