These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Foe Yay: The "Female Klown" scene, starts with the the Terenzi brothers meeting the Klowns, who do the aforementioned Breast Expansion scene. You'd think they were done for. The next scene however shows them running like hell with no marks on them save for comically huge lipstick marks on their face. They must have done some impression on them otherwise they would have either been corpses or next in the cotton candy cocoon collection.
Inferred Holocaust: The town's entire population gets killed outright or turned into cocoons (apparently an irreversible process) and then blown up when the Klowns' spaceship explodes. Only five characters survive, three of whom merely due to their Disney Deaths. Um... yeah?
Moral Event Horizon: One of the Klowns, Jumbo luring a child in an attempt to bash her skull in with a mallet, luckily her mother stops her, in order to get her back to eating food. Made worse because that clown pretended to be friendly even by the Klown's standards in order to lure her.
Nightmare Fuel: Obviously was intending to be this to anyone with even a passing fear of clowns. Ironically, some people with clown phobias find the characters in this movie less scary than normal ones because they're so Obviously Evil, as opposed to the real thing trying sincerely to be cheerful and innocent.