The oxygen tanks on the buoy keep disappearing and reappearing in between angles.
Towards the end when Linc aims the pistol at Mahone, a close-up shot clearly shows that the pistol hammer is cocked. A few seconds later Linc cocks it again.
When Michael and McGrady share a bottle of oxygen underwater the bottle jumps from Michael to McGrady with one cut to be than passed to Michael by McGrady.
When Linc crasher the bus he's seen wearing a Black T-shirt with a gray sweater under. Then when he's driving to the beach his shirt switches to a blue one. In the next shot of him in the car he's back with the black one.
When Michael climbs into the boat from the water, he puts his hand on the engine. It would have been too hot to touch at the time.