Revealing mistake: When Larry is camping in the tree outside Ellen's house, if you look at his face before he falls it is a stuntman falling, not James Belushi. (01:03:35)
Continuity mistake: Toward the end, when James Belushi swerves to miss his dog in the middle of the street he crashes his car into a parked car and then roll to a stop. Notice before the camera cuts to a frontal shot of the wrecked car, that there is a huge spider crack in the windshield, as if James hit it with his head. This huge spider crack then disappears once the camera cuts to the frontal shot and the windshield is in perfect shape. (01:33:45)
Answer: Nothing, they're from an alternate reality, Jim Belushi was shown a possible future if he had hit that home run. A different life, job, wife and kids.