I can fluidly open a trash bag, pull it into a straight line, and toss it like a dart, landing it in an open trash can from up to 30ft.

This only works with those cheap bags that businesses use and this was honed over years of changing trash at various businesses. Not useful, very majestic though.

I turn yaml into aws bills

I can speedwalk very fast and with good stability. It comes on handy when I need to move fast with a glass of liquid, which doesn’t come up a lot.

I am better at helping others flesh out ideas and expanding on them than I am making up my own ideas. I’m good at troubleshooting problems better than most I’ve ever met. I owe both to PC troubleshooting over the last few decades (from Apple 2e and Pentium II to present). I find that people these days have tunnel vision and focus on short-term gains over long-term payoffs, often to the detriment of future productivity.

I won’t say “mastered” as I have lost the ability now, but back in college Pokemon endgame content gave me the ability to read braille by looking at it.

That’s about as useless as possible.

I can solve a 3x3 rubix cube in under 60 seconds.

Just practice and memorization, it’s not that hard.

I can jump up a small flight of stairs (3-4 stairs) in a way that makes it look like I just floated up the stairs.

I got good at it because in high school I thought it would be funny to be able to do this so I started practicing.

Alternating between American and British spellings like it’s nothing. I just use whatever spelling I vibe with at the time. I’ll do the same with units of measurement as well.

I wouldn’t say I’ve mastered it but with my current set up I am as good as I can get with macrophotography.

I can’t imagine spending the time to master anything and then thinking the skill is useless.

Whistling. Took decades and I can do it two different ways (lips and teeth). I now do it subconsciously when listening to music where I’ll typically add other melodies or harmonies. I can bird call pretty much flawlessly. Loudest I get is over 100dB. Average is low 90s. Not much use but it’s fun.

Procrastinating, i don’t know how i became so good at it.

I can make double fart sounds by laying on my back and cupping my knee-armpits with both hands.

Not entirely useless though; I showed this to my SO 7 years ago when we started dating and she was clearly impressed as she’s still hanging around.

I can spew random trivia about every latin american country.

I can pick up different objects with chopsticks in both hands at the same time. Can also eat this way.

I didn’t put any time into mastering this, though. I just gave it a try one day and found it to be easy.