Visible crew/equipment: When the Pest is trying to hustle the crowd as a blind man, there is a Hispanic kid in the background watching. He starts making faces and throwing up hand symbols at the camera. He was either a kid who sneaked onto the set or an extra who decided to get noticed.
Other mistake: Before Pest is getting hunted, the hunter makes a toast, there are two mistakes here, one is that the champagne glasses fluctuate the amount that is in them, and in a couple cut scenes you'll see that it is raining, and in others it isn't.
Factual error: When the Pest is in his girlfriend's house, and Gustav comes in, the pest has way too many bullets. The pistol he has holds one bullet, not 15 or however many he fired.
Continuity mistake: At the festival, when the Pest walks over to Xantha he's holding a cup in his hand, when they switch camera angles the cup is gone.
Plot hole: When Leo, Gustav and Himmel are driving through Miami looking for Pest, Gustav notices that the tracking device that was put in Pest's underwear shorted out because of how much he was sweating. An earlier scene showed that Pest jumped off a boat in the middle of the ocean and swam to Miami. Since the tracking device was in Pest's underwear the whole time, it should have shorted out the moment he jumped into the water leaving Pest safe and Leo, Himmel and Gustav driving around aimlessly.