When was the last time you made a fool out of yourself?

I filled in on bass once for a friends band and we just so happened to do an Alice In Chains cover (man in the box). I also did some singing. What I didn't know is that he planned on doing a softer more stripped down type of vocal approach when it came to singing "Jesus Christ, deny your maker". I looked like an ass because I was belting it out while he wasn't.