One of Gavin's very favorite things to do, is to have Flip tickled to crap out of him! It's too funny to watch. They roll around on the bed and tickle until Gavin's face is purple and he can barely breath. I often have to step in and make them take a break from their fun so that Gavin can calm down for a bit. He simply doesn't notice that he's not getting any oxygen to his brain!