Ah, I know that feeling well -- a combination of anger and shame and regret. Sorry, mang. Then again, you crashed in the middle of traffic and only have minor scuffing (to you, the bike and your gear) to show for it. All in all, that's a "good" crash, to the extent any are. And this uses up one from your crash quota, which is also good news.
Glad you're ok, MM. [moto] I'll buy the beer.
Beer. Good.