Panel 1: As John gets ready to leave, Liz asks if he's going away because Lynn thinks her readers have the same poor memory she does. He replies by explaining that he and some of his fellow dentists are going to Ottawa for a convention and he volunteered to drive.
Panel 2: When he says that he's planing on driving Elly's station wagon because it seats more people, Mike does that palms-out thing when he asks him if he realizes that he's leaving Elly with the sports car.
Panel 3: Since he forgets that no matter how safe Elly a driver might be, she shares the roads with jerks like Velocity Boy and says that he has no problem with that because of Elly's skill behind the wheel; as Elly's silhouette approaches, he goes on to ask what's wrong with Elly driving something wild and sporty for once.
Panel 4: As we bear witness to Elly sitting at the table, wearing her housecoat and eating a big bowl of bran flakes, Mike says that he finds it hard to imagine.
Summary: What the next few days prove is that Elly herself finds it hard to imagine too. We (and Lynn) might have a bit of fun at her expense but the plain fact is that John's sporty little car makes her feel kind of anxious because it's a sporty little car and not the tank she likes to drive because it makes her feel protected. This is half of why she's so blasted flustered by the accident, I think: her fear of actually feeling the road.