I've run into this problem a few times but it was never a complete loss of airway. Usually a finger down the throat produced the necessary heaving action. If you lose consciousness from KO'ing yourself, you won't be able to try other methods to save yourself, like a self-tracheotomy.
Yeah that looks like quite a fun rumpus room. Though playing guitar at the end might have taken away from the seriousness of the subject matter.