Possibly, in the after-credits scene. A character is catapulted through a hedge, a dog whimpers off-screen, and the character comes back and says something like, "I may have killed your neighbour's dog when I landed." We've never seen the dog; all it is is a sound.
I wasn’t sure - there is a brief shot where Ice Cube looks somewhat directly at the camera and says “today was a good day” with a smirk which may be a reference to his well known song. It’s silly.
Crazy, stupid, m*dget. A character tries to “scare another character straight” by telling him that he will end up legless and lonely, and it’s a weird drawn out thing about how underage drinking leads to disability and thus having your life ruined.
There's a whole thing about a person in a biker gang who has breasts and a beard. Kevin Hart's character thinks the person is a man, and one of the bikers says "That's my wife", then several more lines are said about the person's gender. KH's character says "it" and "thing" about the person, and it's obviously all supposed to be funny.