I was sitting at a light in Daytona once and this family of tourists (Asian, not sure what country?) walks by and the dad is pointing at my bike (I was on the GSXR) and the little kid had this BIG grin on his face, and made a twisting motion with his hand. So I blipped the throttle a little.
Well, me being the mental giant that I am, motion the kid over and point at the throttle. So he takes hold, and twists it just a tiny little bit, and then starts cracking up, reaches up again, takes hold, and absolutely slams the throttle to the stop! My bike bounced off the rev limiter before I had a chance to grab the throttle! That time it scared the crap out of the kid! (I have a Micron Race can, it's a 'little' loud!)