I almost came off the other day, heavy(ish) braking in a straight line and either the front locked up or tyre broke away but whatever happened i got a mini tank slapper on the go, instinctively or uncontrollably put my foot down to stabilise and ive parted the sole of my boot from the toe, im sure it'll glue back on!
I wasnt going terribly fast at that point but the boots defo saved me some broken toes at least.