First I'd probably spit out every h*ly sh*t word I had in my vocabulary, then I'd frantically search for my cell phone throwing old food wrappers and pop bottles all over the inside of the truck cab in the process......
Once I found my cell phone I'd jump out of the rig screaming "Oh my god, oh my god, oh my god, did YOU see what just happened?" at everyone....then with no thought to self or safety I would run as fast as my short little legs would carry me over to the wanna be skydiver off the moped, tap him on the shoulder and say......
"Dude, I missed filming that with my phone........could you do it again?"
Then I'd plaster the video all over Facebook...............