Here’s a recurring riff it seems like I should know, but I’m drawing a blank on it. It’s mostly a Sci-Fi era thing, definitely Team Mike:
“Chomp!”
From a TV commercial, maybe?
“Keep watching the medicine cabinet” from the end of Body Care and Grooming has always baffled me.
I always just thought it was a nod to scavenger hunts: when they give people a list of weird stuff to find. Then the first person to come back with everything on the list is the winner.
Not to be confused with a scavenger s(c)ale, of course. 
I think that’s a play on “Keep watching the skies!” from some famous movie or another about alien invaders. Hence the addition of, “You’re next!”