Continuity mistake: In the scene where Martin Lawrence read's Danny DeVito's cellphone number, when he opens the piece of paper with the number on it, you can see the bottom of the styrofoam coffee cup he's holding. He manages to turn the cup horizontally without spilling the coffee inside.
Continuity mistake: At the end of the movie when Martin Lawrence and Danny DeVito are wrestling on the boat,the boat hits something in the water. The boat begins to sink and sink quickly, they show them both sitting on about 2 foot of total surface floating above water. The very next scene they show the boat in perfect condition with not a scratch on it and floating.