only 1 that i know of, but ive smoked my head 3-4 times skating, so i dont doubt that ive had 2-3. when i was in the hospital when i got the one i know about, the doc said that if i hit my head again hard i run the risk of causing permanent damage. thats fucking scary. i always wear a helmet now.
one when i was wakeboarding at high north. i slammed my head real hard, it wasnt like super bad, i didnt black out or anything, but my mind slowed down for like an hour, i couldnt think straight at all
1 but not from skiing..it was from sledding on a steep ass hill at my cousins house and it was sooo icy that day and i went right into his house head 1st..it was bad..i was throwing up for days with killer head pain