Triskaidekaphobia

I have this pair of brown Converse shoes, which I purchased on clearance at Target. I like them. However, I've noticed a curious proclivity toward bad improv experiences when wearing them. Whether a bad show or near disastrous rehearsal, these One Stars are singular C-listers at best. At least when it comes to sheathing my soles on this improv journey. I'm not really superstitious, but this has me wondering...

Do my fellow improvisers have (or know of) any pre-show rituals, superstitions, etc.? Share if you dare...this should be fun.