Gravity block Glides around like an angel.

This bug lets you make any gravity block GLIDE

What I expected to happen was...:
that the gravity block would pop onto the snow layers/fences/walls

What actually happened was...:
that it didn't pop and instead GLIDES LIKE IF IT WAS 0-G

Steps to Reproduce:
1. Create an gravity block launcher.
2. Place 7 snow/fence/wall on top of each other on where the anvil lands, repeat on the same direction the gravity block is going and continue until you're satisfied.
3. Launch the block

4. it sould GLIDE on the snow/fences/walls.

NOTE : the block doesn't seem to lose speed