The general goal of speedrunning is to complete a game as fast as possible, under a specified set of rules. While these runs are often more serious in nature, many games also contain sillier categories just for the fun of it. I've seen a lot of speedruns in my time, but I have to say that Super Mario Odyssey may have one of the funniest, most enjoyable runs yet. Dubbed the "Nipple%" category, the goal is to buy the boxer shorts and get Mario shirtless as fast as you can.
This category and its popularity, of course, mimics the fanaticism that took the internet by storm last fall, when it was revealed that Mario does, in fact, have nipples. Of the 59 runs on the official leaderboard, Stravos96 (as of writing) holds the record with a time of 9 minutes and 57 seconds. This run makes uses of smooth movement techniques coupled with a clever use of loading zones to quickly gain the hundreds of coins necessary for the purchase.
If you're interested in viewing this short but entertaining run, you can find it here. I'm always excited to see what else the Super Mario Odyssey community can come up with next!