What is the most useless knowledge or skill that you have?

[Sweetener12]

Mine would be an ability to recognize any tv commercial in 0.0001 seconds

I can neigh.

When I was 9 I learned to say Llanfairpwllgwyngyllgogerychwyrndrobwllllantysiliogogogoch

I was promised 50p if I could.

We are not Welsh...

I can tell when I've used the last staple

I can count seconds very accurately.
I can sing “Rudolph the Red-nosed Reindeer” in Latin
I can say the longest word in the German language

I am very envious of the pp who can do perfect cartwheels

All Smith's lyrics.
Hiccup cure.
Pedantic punctuation rules.

@YellowJellyfish croupier?

I was one one for a year before uni. I can still just about shuffle chips and pick up 20 chips by feel.

I can identify disarticulated human bones. Not much call for it in daily life as I am a TA now.

My dad does a cherry thing - he can put a cherry in his mouth, completely strip the fruit from the stone and leave the stalk attached. I've tried to copy this since a child and still can't manage it at nearly 40. Dad is still hilariously aug about it .