I love the one that claims that trees don't exist. Yes, you've read that right. Those things that we consider to be trees? They are apparently... wait for it... bushes. I'm not making this one up.
I dunno, man, I can also pronounce Llanfairpwllgwyngyllgogerychwyrndrobwllllantysiliogogogoch and recite Jugemu's whole name from memory, but so far it didn't really impress anyone. Maybe I go to wrong parties. Ah, who am I kidding, look at what I do with my free time. It's obvious that I don't...
I can recite the Lord's Prayer in the Gothic language.
What makes this even funnier is that I'm an atheist and can't say the Lord's Prayer in my own language despite knowing it in Gothic.