Hair.
I have normal fine hair on my thighs that grows about 1/2 inch long. I am not an ape.
When I was about 30 I found a single fine one, about 10 or 12 inches long. Which struck me as very odd!
I pulled it out. About every 5 or 6 years since I re-find it again. Same spot, still stupidly long etc. And pull it out. Why does one hair out of hundreds of thousands decide to grow a foot long? Repeatedly.
I am now 64 and noticed its back again. Or it was...
Good job they are not all like that!