A bunch of Elvis impersonators were supposed to be doing a charity gig following Marcel Marceau, but every time they went near the stage he (and the rest of his support cast) would stop and stare at them.
After several attempts to get on stage the Elvises (Elvese?) started to argue about which of them should go on first. Eventually the stage manager ran over and demanded that they all get on stage.
At which point one of them told him, "But we can't go on together, with suspicious mimes..."