1) No bloody rictus? Eyes closed? Surgeon's mask on? Film several different ways. Don't have to do tracking shot repeatedly, just frame it so that his face isn't seen.
2) If the "INVALID" moment is taken out, what is going to be the transition tool? Just transitioning from real-time laughter doesn't strike as being quite as effective. Maybe he doesn't scream into the camera, maybe it's only a whisper, a nearly subliminal whisper.