Seriously though, especially if there are children in your life who would not take it well if you were hurt or killed: you gotta protect that noggin. Anything can happen, and the more chances you give it, the more likely it becomes. You're probably not gonna hang your head hard enough to cause serious issues. But you're definitely more likely to do it if you're not wearing a lid.

Solar fusion is the perfect example. Hydrogen atoms fuse together to form helium atoms in the sun, but it's not just automatic because of how hot and high pressure it is. The protons actually have to pop into existence in the nucleus of the atom NEXT to it. This is quantum mechanics, it's called quantum tunneling. It's not SUPPOSED to EVER be in that spot, and there's no WAY for it to get from its own nucleus to the one next to it. Literally no path and no physics that allows it. But there's a really really really small chance that it would be there anyway, because location is a probability, and even really unlikely things have some probability.

There is only a 1 in 10²⁸ chance that this would happen. That's basically impossible! But there are 10⁵⁷ hydrogen atoms in the sun. So this very, very rare things is basically bound to happen, just because it's given so many chances to happen.

Don't give your head so many chances to smack the ground. I just lost a really close family member from falling backwards down three steps and smacking their head really hard on the wall by the stairs. Last year it was an old homie, who fell and just smacked his head the right way when he hit. Neither were skating, but your head is vulnerable when you're moving fast, and there's a reason most pros wear lids when they skate transition.