It's a guy that goes to all the shows and brings a air horn. That's really all there is to it. I've been to a bunch of CZW shows and the guy usually keeps it under control and only breaks it out for the really big spots.
TV shows are the best entertainment programmes like wrestling. My favourite TV show is RAW and SMACK DOWN. I specially like fight of Rey mysterio and Randy Ortan. It was very amazing fight with lots of stunt.