diff --git a/Chraft/World/Blocks/BlockGravel.cs b/Chraft/World/Blocks/BlockGravel.cs
index fd807e41..754837e5 100644
--- a/Chraft/World/Blocks/BlockGravel.cs
+++ b/Chraft/World/Blocks/BlockGravel.cs
@@ -82,7 +82,7 @@ protected void StartPhysics(StructBlock block)
             var world = block.World;
             Remove(block);
             FallingGravel fgBlock = new FallingGravel(world, new AbsWorldCoords(block.Coords.WorldX + 0.5, block.Coords.WorldY + 0.5, block.Coords.WorldZ + 0.5));
-            fgBlock.Start();
+            fgBlock.Start((int)Type);
             world.PhysicsBlocks.TryAdd(fgBlock.EntityId, fgBlock);
         }
     }
diff --git a/Chraft/World/Blocks/BlockSand.cs b/Chraft/World/Blocks/BlockSand.cs
index 3c0a2167..dbbbac58 100644
--- a/Chraft/World/Blocks/BlockSand.cs
+++ b/Chraft/World/Blocks/BlockSand.cs
@@ -56,7 +56,7 @@ protected void StartPhysics(StructBlock block)
         {
             Remove(block);
             var fsBlock = new FallingSand(block.World, new AbsWorldCoords(block.Coords.WorldX + 0.5, block.Coords.WorldY + 0.5, block.Coords.WorldZ + 0.5));
-            fsBlock.Start();
+            fsBlock.Start((int)Type);
             block.World.PhysicsBlocks.TryAdd(fsBlock.EntityId, fsBlock);
         }
     }
diff --git a/Chraft/World/Blocks/Physics/FallingSand.cs b/Chraft/World/Blocks/Physics/FallingSand.cs
index a2ff1134..44a54cef 100644
--- a/Chraft/World/Blocks/Physics/FallingSand.cs
+++ b/Chraft/World/Blocks/Physics/FallingSand.cs
@@ -35,7 +35,7 @@ public FallingSand(WorldManager world, AbsWorldCoords pos) : base(world, pos)
         {
             Type = Net.Packets.AddObjectVehiclePacket.ObjectType.FallingSand;
             BlockId = (byte) BlockData.Blocks.Sand;
-            Velocity = new Vector3(0, -0.4D, 0);
+            Velocity = new Vector3(0, -0.4D, 0);//TODO Corect Falling speed ?
         }
 
         public override void Simulate()