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.
Ellen Robertson's dog is named Hercules. Hercules was the name of Arnold Schwarzenegger's character in his first movie, and Arnold also starred with Linda Hamilton (who played Ellen Robertson/Burrows) in The Terminator and Terminator 2. This was done again in Terminator 3: Rise of The Machines which had a scene with a cat named Hercules.