Factual error: When Suzanne gets in Nick's SUV the first time, she comments on his Satchel Paige bobblehead. Nick replies that Satchel was his hero since he was still pitching for the Royals at 59. Actually, Satchel Paige last pitched for the Kansas City Athletics in 1965 before they moved to Oakland.
Visible crew/equipment: When Nick first pulls up outside his store in the Navigator, Marty comes out and starts admiring it and you can see a camera man reflected in the window next to the door.
Chosen answer: It's called the "Hamster Dance Song" by Hampton the Hamster.