LOL! In my day the bus driver would've had all the KIDS flip him off. If not moon 'em.
And FWIW I got the chance to flip him off a couple years ago. I was on my motorcycle southbound on the 405 freeway with the motorcade going northbound (from LAX). If you stand on the pegs of a motorcycle, it makes you a LOT taller than the surrounding cars and I was in the left-hand lane already (closest to the northbound lanes) so I'm sure SOMEONE saw me.
I actually got a few "thumbs up" and approval honks from some of the cars around me stuck in traffic.