Ive biked to work for years and only had 2 bad crashes. Both involved slamming hard into pavement at speed, one had me slide into a tree. Both times I hit my shoulder/arm/hip hard and was honestly very dazed, but neither time did I hit my head. You can shake a bike accident off if you get lucky in how you hit the ground. Mainly if you dont smack your head. Super duper wear a helmet cause that the kind of spill that fucks you.