You know that Whac-A-Mole game? Where the heads of little moles pop up and you have to hit them with a big, soft hammer before they go back in their hole? This video reminds me of that. Watch these three dogs simulate that in a kitty door. 

First of all, it's a kitty door. These pups seem to realize they can't get through and clearly use this door as a fun window. I love how you never know which pup you're going to get.