R.I.P. my XT rear derailleur, which exploded apart on me as I was sprinting out from between a cab and streetcar. The ****er really went out with a bang and almost took the rear wheel with it (plus obligatory complete lock-up of drivetrain w/ awkward crank position). At least my high speed cx dismounts are coming along nicely.

Edit: The best part was the streetcar driver getting out to let me know which way the wreckage flew in case I wanted to go back for it. That's cool, thanks man (at least the sentiment was nice).