24 Hour Race OTB - Separated AC Joint

Riding simple doubletrack during the 24 Hour race ... thinking about everything but the course (I'm thirsty, what's the next trail, I should catch those guys) .. hit a rock that twisted my bars and sent me flying. Dislocated my AC joint but had to ride another 3km to get to the next checkpoint to get help and tag in a teammate to finish my lap.