I once had a weird rear tire lock up from a twig. Wasn't going fast, and ran over a twig that got shot up into the rear wheel sideways, jammed against the frame and my tires skidded to a halt. Stick didn't break, no spoke damage and I stopped immediately, so all was fine.
buta weird coincidence of how it happened.
I've also had snow rubbing against top of fork with embedded grit scratching it up. That was with 2.5 tires with not enough clearance, so following winter used old 2.15 mtb tires instead.