Quoted from BackFlipper:

Game on left in the video is on legs and game on right is on the crate. Both games are on concrete as opposed to carpeting. Sitting on carpeting on the crate, the game is almost "UN-nudgeable." If you put the game on concrete with the legs on, you can have 5 minute ball times because you can control the ball through nudging. Carpet and crate = 30 second ball times. It really makes that big of a difference.