Just wondering if anyone else's LO does this? When DD3 is tired, she shakes her head from side to side quickly when she is trying to go to sleep so she has a big bald spot on the back of her head. She also lifts her legs up and slams them down on the mattress over and over again. I don't know if she's trying to do it to settle down for sleep but it seems to keep her awake. Any ideas?