I had a knee high wave last winter that I was screwing around on, doing little floaters over these tiny sections. I was laughing to myself about how small it was and what a moron I was for being out there in the freezing cold surfing nothing better than thigh high waves. At the end of this wave I hopped a mini off the lip and the wave popped my board right up and into my face. I heard my nose crackle and quickly realized it was broken. The water was so cold it didn't bleed until 2 hours later as I was driving somewhere and then a rush of blood poured out onto my shirt. Damm thing took 2 months to heal .