That's nasty! π But probably true.
I'm curious how he just "made himself puke". Is Billie that in control of his stomach or was he so committed to grossing Dave Grohl out that he actually stuck a finger down his throat? Probably the latter, but maybe he's been hiding some disgusting David Blaine-esque talent that we'll never know about. π
Anyway... I found out that it was Dave Grohl who told Billie how to sing while also chewing gum, so that's a neat little fact that I didn't know before. I must say I was impressed when I noticed him starting to do that, I just wasn't aware who taught him until now.