Thanks to Usual John, for suggesting this one, and also for alerting us that D.D. Degg’s column at The Daily Cartoonist had a look at this strip , and very courteously linked to us when he applied the phrase “Comic I Don’t Understand” to this ThatABaby.
All right — Why Dagwood? Do you think he is known for Frisbee mishaps?
Comics I Don't Understand 
See the Sunday Blondie dated 02-Oct-2022; both the extreme slapstick and especially the word “again” in the fourth panel would suggest that this was not the first time that Elmo landed a frisbee on Dagwood’s roof:
P.S. Unfortunately (and unlike GoComics), Comics Kingdom doesn’t offer any sort of reliable search services, so it would be very difficult to find additional examples. I discovered this one just by chance.
I think Dagwood’s presence is explained by the idea that a comic character’s neighbor is also a comic character (from another strip).
What I want to know is why he’s apparently intentionally chucking frisbees onto the roof.
I am not familiar with the Thatababy strip, and I don’t know the back story of the parents. I would be inclined to conjecture that the father is actually Elmo, who has grown up, gotten married, had a child, and is living in his parents old house. That is honestly the only logical explanation that I can come up with.
According to this strip’s Wikipedia entry, Mom and Dad are not named in the strip. But, then, if my name was Elmo, I’m not sure I’d be that anxious to share it.
(apologies to one of my neighbors, a 50 year old man named Elmo, like his father, and I think his father before him.)
A search also found this one:
Hmm. That obviously did not work. https://www.pinterest.com/pin/19844054581625019/
@ chemgal – Thanks for digging up that Blondie strip (30-Sep-2007). It’s basically exactly the same gag, even down to the irrational backwards movement of the ladder. Embedding images from Pinterest is never easy, but working from Comics Kingdom is even harder:
Shouldn’t they be called flying disks?
:-)
@ Grawlix (8) – Given the prominent placement of the author’s name in the second panel, and the way the father is launching that (red) “disk” into the air, one might think it was a clay pigeon.