OK, so the story behind the pic is this: We usually do a tour of northern Michigan which is produced by this guy Tim Scully. Scully is a bassist and music lover and his house is decorated with various instruments on the walls. One day I was getting kind of ansy waiting around for the next gig, since we had been staying at his house while on this tour. So I started taking down the instruments on the walls to see if they would actually play. I think that was when Root Doctor was playing the tour because I'm pretty sure Marge, our lead singer's wife, was the one taking the photos. She has photos of me playing drums (no, they weren't on the wall, but set up in his rehearsal space), upright bass, bass guitar, saxophone (alto and tenor), clarinet, trumpet, and trombone. Probably guitar somewhere, too. Can I actually play those instruments? No, but I can get a tone and play a few notes on the horns.
I think the trombone had something stuck in it and I was having a lot of difficulty getting air through it, hence the expression. But it looks pretty natural to me from seeing other trombonists.