Another broken carbon stem. I'll let Chris explain:
Broke out of nowhere with no warning whatsoever. Went from sitting to standing on a small incline, and first pedal stroke... crack and down. This stem had gotten some decent mileage and use, but I will be switching to all aluminum steering from now on ... not including fork. I believe this is a look branded easton ea90. Came out of it relatively minor. Mainly right elbow trauma and minor road rash and a chainring gash.
Yikes. He's lucky he was going slow when it broke.