Skateboarding related? Because I've got plenty in my every day life. When I was somewhere in my teens I was on the path to full on OCD I guess. I would have to make weird noises sometimes to scratch this sort of itch in my brain, or if I tapped one leg I'd have to tap the other one, then I'd have to do it in reverse order to make everything sort of "even". It wasn't 24/7 but my brain would kind of go, hey remember that annoying shit we do? Lets do it!
So it would happen sometimes watching skate videos. If someone did a 5-0, I needed a fucking nose grind or crook or something on the front truck and vice versa, and then again, reverse order to even shit out. It was so annoying but I was so scared for it to get really insane that I eventually forced myself to not care or not give in. Like the leg stuff I would just stop even if it felt so annoying, and the skate video thing I don't remember how I got out of it. I would kind of have to go numb. Very weird, and thank god I just forced myself to not do it. Sometimes I still catch myself counting to 12, something about 12 and even numbers fucks me up. But if I notice it I stop it right away. Very weird, thank god it's not really a thing anymore.
But skate videos would suck when it happened.