While a brilliant monster reveal in a film (e.g. Alien, Jaws, The Thing) is normally referred to as the "money shot", a bad monster reveal is referred to as a "coupon shot". Coined by RedLetterMedia in their reviews of the films Biohazard and Carnosaur 2.
"I thought we were gonna get a great reveal of the monster, but instead we get another awkward coupon shot of the alien just standing there next to a guy in the back of a truck" - Rich Evans
Steve won misspelled this word in the spelling bee back in 3rd grade. He spelled C-O-U-P-O-N and while waiting for the principal to tell him he was correct he blurted out "D!" Steve is a dumbass. But you should still vote for him.
Jordan Belfort: Hey, fellas! Look what I found in my pocket! Look!
he pulls out a big wad of cash
Jordan Belfort: A year's salary, right here! You know what I call them? Fun coupons.
he starts throwing the money at Denham and Hughes as they walk away
Jordan Belfort: See that? They're fun coupons!