You know, in that scene with the guy at conn who gets offed by Nagilum. Wesley is there for literally the entire episode right up to that scene, and indeed for every scene afterwards, but at that crucial moment he's very conspicuously f**ked off somewhere else for a bit. Where do we think he vanished to, then? My money is on him having needed a toilet break. He probably said to the other guy, "Dude, can you cover me for, like, five minutes? I really need to go to the bathroom." And then when he comes back (I hope he remembered to wash his hands first!), the other guy's lying there dead on the floor. Sucks to be that conn guy though, huh? Talk about being in the wrong place at the wrong time.