The foam in Vince's champagne glass when he pours it and drinks it.
The spade that falls from the wall when Vince enters the shed replaces itself.
When Rollo is standing beside the lemur cage, he raises his left hand to wave, yet in the next shot his right hand is in the air.
Vince is not reflected in the mirror when he enters the room behind his father's party.
When Vince is yelling, "He's talking to himself, and I'm the loony?" the second shot has him saying something else, possibly the first part of the line again.
When Willa tells Vince she had an extraordinary experience with the gorilla, we hear her say "yesterday", but she is obviously saying "this morning".