28 years of snowboarding and skateboarding will do that.
I ride over 100 days a year for the last decade and used to be paid to do so. It’s an occupational hazard…
I got briefly knocked out skateboarding a couple times and snowboarding a couple more. Ever catch your heels? If you know you know. My TBI was skateboarding the first day and got a concussion without losing consciousness and didn’t know it, the second day was snowboarding and a friend landed on my head in the park. I was out for 5 minutes. Which is a relatively long time in terms of ‘mild’ head injuries.
One of my brief knock outs was when I got hit while working… almost 20 years after the TBI. The tbi makes losing consciousness happen quicker but a lot of my brief knock outs were pre TBI.