diff --git a/BauSystem/BauSystem_Main/src/de/steamwar/bausystem/features/simulator/preview/SimulatorPreviewTNT.java b/BauSystem/BauSystem_Main/src/de/steamwar/bausystem/features/simulator/preview/SimulatorPreviewTNT.java
index e647b46d..6df7a066 100644
--- a/BauSystem/BauSystem_Main/src/de/steamwar/bausystem/features/simulator/preview/SimulatorPreviewTNT.java
+++ b/BauSystem/BauSystem_Main/src/de/steamwar/bausystem/features/simulator/preview/SimulatorPreviewTNT.java
@@ -66,7 +66,7 @@ public class SimulatorPreviewTNT {
         vz *= 0.98;
 
         // OnGround Velocity * 0.7 -0.5 0.7
-        if (false) {
+        if (onGround) {
             vx *= 0.7;
             vy *= -0.5;
             vz *= 0.7;
@@ -91,17 +91,17 @@ public class SimulatorPreviewTNT {
             z += vz;
         }
 
-        boolean flag = !equal(vx, vec.getX());
-        boolean flag1 = !equal(vz, vec.getZ());
-        boolean horizontalCollision = flag || flag1;
+        boolean xCollision = !equal(vx, vec.getX());
+        boolean zCollision = !equal(vz, vec.getZ());
+        boolean horizontalCollision = xCollision || zCollision;
         if (Math.abs(vy) > 0.0F) {
             boolean verticalCollision = vy != vec.getY();
             onGround = verticalCollision && vy < (double) 0.0F;
         }
 
         if (horizontalCollision) {
-            if (flag) vx = 0;
-            if (flag1) vz = 0;
+            if (xCollision) vx = 0;
+            if (zCollision) vz = 0;
         }
         // TODO: Get Block -> updateEntityMovementAfterFallOn!
         // TODO: Get BlockSpeedFactor multiply