Gregory was in the basement of the PizzaPlex, before deciding to go into Burntrap's recharge station for...whatever reason. As the door closes, Gregory is transported back in time, specifically to 1983. He looks around, confused. He's in the old pizzeria, Freddy Fazbear's Family Diner.

"Huh. Weird...I've never time traveled before. Might as well look around while I'm here.."

He begins walking around the pizzeria, observing his surroundings. It seems to be someone's birthday..?