I have crashed on the street, gravel, dirt, big rocks and mud. None of those of much consequence. Track crash something else all together. Low side on an off camber righthander. Everything copacetic: protective gear working, bike ahead of me, then the rumble strip curve. OUCH. 5 ribs, scapular and destroyed bike bodywork. One can get hurt even when everyone's going the same way and there's no crossing traffic.