The one where the guy sets a jukebox to play "What's new pussycat" like 11 times then "It's not unusual" once then back to "What's new pussycat" and I laugh whenever I think of that story. The Caveman Spongebob one is p cool too. I also like the vine where the guy is playing the notes to "Sail" and this one kid slams his leg on the piano and the guy playing falls with his piano. A true, dedicated piano player.
Also Dril's twitter. Amazing.