(Strip Number 189, Original Publication Date, 30 October 1981)
Panel 1: We start off with Mike, who's in his cowboy outfit, yelling "POW! BLAM BLAM! BAM!" while perched on top of John's easy chair; since John is (a) sitting in it and (b) new to the idea that children make noise, he bugs his eyes out in horror.
Panel 2: His cheery yell of "HIYEEOOOOOSILVER!!!" and pretending that he's riding his trusty steed delight Lizzie and horrify the half of Elly's face that we see at the edge of the frame.
Panel 3: The final panel shows Bug-Eyed Elly with her hands on his shoulders as he tells her "Honest, Ma; I'm not excited," Since I know how Elly and John react to loud noises, this is owing to an off-panel threat that he be made to stay home if he doesn't settle down.
Summary: I wonder how Lynn's notes will spin this; my personal guess is that we'll get a reminiscence that doesn't explain why it is that John and Elly are so damned delicate that a small boy who's excited about something fills them with fear, disgust and the feeling that if they don't clamp down hard, civilization itself will collapse.