Factual error: When Mya points out his Loch Ness tattoo, and asks when he got it, and he says the night before, it would not be healed as it is. It would still be red, raised, and be covered to protect it. Also, later in the movie when he is on the ground and we see the large tattoo across the whole back, this would also be impossible as a whole back tattoo would take at least two or three long sessions, and this movie takes place over just a couple of days.
Factual error: Paul has hypoglycemia. When he eats the lollipop off the floor and gets up instantly, this would never happen as it takes the sugar a while to get into the bloodstream. He would never be instantly cured.
Factual error: The movie's set in New Jersey, but EASCare, the ambulance service used in the last scene, is a company out of Boston (where the movie was filmed). Also, the license plate on the ambulance has a registration sticker, which New Jersey hasn't used in many years.
Answer: Paul explains to Pahud that it's a misunderstanding, and Pahud then makes Paul Blart his homie.