I spent a year as a bike messenger in New York City. During that time, I did all of the stupid and crazy things bike messengers of that time (ca. 1983) did--one of which, ahem, is now legal.
(One of the great things about getting older is that the statute of limitations runs out--for most offenses, anyway!)
In the "crazy" category is holding my handlebar with one hand, and the rear of a delivery truck or New York City bus with the other. I did that, oh, maybe a handful (pun intended) of times, and only when I was trying to make an extra-fast delivery--and was, oh, partaking of that which is now legal.
Still, as young and stupid (and angry) as I was, I was never part of anything like this--either as pedaler or passenger!:
