 The family goes into the human body exhibit, but Maggie gets distracted and accidentally presses the swallow button, swallowing Homer, Marge and Bart.Maggie presses many buttons until she finally presses the evacuate button, following a visual cue from an apologetic Lisa as to its red color.After the family returns home and wonders why Maggie did not press the red button first, Henry arrives and tells the family Maggie is no longer welcome at the school.