In an amazing clip posted on Ozzy Osbourne's Facebook, you can see the Black Sabbath legend being surprised by a bunch of school kids busting out a rendition of 1980 hit Crazy Train.
It was all done for the third season of Ozzy & Jack's World Detour, the TV show starring The Prince Of Darkness and his son Jack Osbourne. Each episode sees the pair travel the world and take in some history.
"What the fuck is this," he says in true Ozzy fashion, when he walks in and sees The Louisville Leopards standing there doing their thing.
Have a watch below. It's genuinely awesome.