When Lincoln is drinking from the bottle at the beach, the amount of water decreases in an instant. He starts to take his first sip and the angle changes, revealing us the bottle is now only half-full.
When the guard walks away from Michael after holding a gun to his head, he never drops or throws the scope he's holding down. But in the next shot, all Michael has to do is reach in front of him for the scope that should still be in the hands of the guard