wow these are all really interesting, mine would probably jumping out of a moving car, and nearly jumping out a window.
I remember a year ago, i was in the front seat of my mums car, my little sister was just learning that she could stick her fingers down her throat and make her self gag, i totally freaked out and yelled at her to stop, but she just kept doin it and laughing at her self. mum thought it was hiliarious of course but i made her stop the car and i got out.