Continuity mistake: When Mike and Marcus are running from the Miami Bank in pursuit of one of the bad guys, Mike's pant leg rises and you see he has on white socks. In the next scene the bad guy and Mike are struggling on a train, once again Mike's pant leg rises, but this time he has on black socks.
Continuity mistake: During the Hummer chase near the end, the road goes from being dry to wet to dry again.
Continuity mistake: In the Cadillac chasing the mortuary van, as they break through the fence gate heading towards the railroad tracks for few seconds the Cadillac has a front license plate bracket, most noticeable when the water tower is directly in the background. The rest of the chase, it doesn't.
Continuity mistake: After the pool collapses, Mike's arm changes position between being in a lowered position in the wide angle shots and extended in the close-up shot where he says, "Very funny!"
Continuity mistake: Right after the semi is first shown chasing the black Suburban you can see a considerable amount of steam/smoke coming from the Suburban's engine compartment, but none later in the chase scene.
Answer: He was looking through a tiny mirror he was holding in his hand.