Wow, I am a lightweight compared to most of you:

Non-Cycling: Broken hand and nose during college frat party fight in 1980. Was working as a bouncer for our frat party (OK, I was drunk as well) and a few guys started getting rowdy and tearing up the joint. I laid out one and had another by the throat against a brick wall about to clock him when my (bigger) frat brother pulled me away since he was afraid I would have hurt the guy. Ended up punching the wall instead, breaking a few hand bones. Gave the other guy and his buddy a chance to gang up on me and bust my nose. The pain wasn't bad but my nose didn't heal straight and they had to break it again a few weeks later to reset it. Unfortunately the small Asian doctor didn't numb me well enough beforehand.

Cycling: just the occasional numb-hands and "numbnuts".