In the episode "Peggy Hill: The Decline and Fall" (the episode where Peggy is in a full body cast after a skydiving accident), when Bobby is forced to take care of GH, Didi asks Bobby to buy her lottery tickets in one scene and he gets mad and shouts at Didi and then leaves the house. You can definitely tell he's outside because when he opens the door, you can see their porch. However, a few seconds after Bobby leaves the house, Peggy rocks GH to sleep with her big toe and Bobby comes out of a room that clearly isn't the front porch or the backyard. So unless Bobby magically teleported after he left, this is a slipup.