New way to ride.

So in the past few weeks Parker has learned that if he arches his back and wiggles he can get out of anything. Usually this happens when he is upset, but now he thinks it is a little game and does it all time. A few days ago we were getting ready for our walk, i set him in his stroller and I looked down and he had slid down to put his head where his bottom goes. I look at him and he just laughs, he thinks he is so funny, I then make a big deal and play with him and say how did you get there? So needless to say he has to be strapped in or he slides down the whole time waiting for my reaction. Funny boy!