Every find those mysterious injuries you don't remember getting? I just noticed this while I was in the shower this morning. "Whoa, were did that come from". I know it was from my ride but I was wearing some thin "Play" shinguards. Strange.
http://www.lolight.com/images/ankle.jpg

Ouch. I had a grape sized bump swell up on my shin after a ride a while ago and I didn't even remember hitting my shin. Come to think of it, my only crash was over the handlebars into the mud on that ride. Makes you think.....

Damnation! That's the ugliest looking arm I have ever seen; funny glove too.

Wombat

the bottom edge of the shin guard was wapping up against your shin. Perhaps you Should wear a shin guard shin guard.

Maybe you're right! Time to invest in some shin guards actually made for MTB and not street riding. Oh well, at least it doesn't hurt.