Curious?

Among the many mysteries that Kenzie continues to stump us with is the SIB of head hitting. The velocity with which she hits herself has got to hurt! We use a helmet when it gets really bad but in public I always feel sad that other kids stare at her. I try to laugh it off by saying "her mom is a really bad wheelchair driver" if a full explanation isn't called for. We have tried every conceivable tactic to change the behavior. If anyone has had success "displacing" this I would love to hear about it!