Pop quiz! What’s happening in this panel?

A. They’re reacting to one of Ed’s awful puns.
B. They’re reacting to Ed doing $80,000 worth of damage to their house.
C. A stranger just asked them if they’ve ever heard of Lisa’s Story.
D. Something about comic books that everyone just instinctively knows.
E. The grocery store is out of those exotic English muffins they like.
F. The last Walkman on earth just broke.
G. They’re deeply in love with each other, and just re-lived a major moment in their lives together down to the last detail.