It makes sense that a cartoonist’s first thought when trying to memorialize the life of Neil Armstrong would be those iconic footprints he left on the moon (even though in most photos, it’s really Buzz Aldrin’s footprint).
When five or more cartoonists draw the same gag, we refer to it as a “Cartoon Yahtzee.” There is a basic rule of thumb to go by, “if one other guy drew it, he’s a plagiarist; if five other guys drew it, they’re hacks; if a dozen other guys drew it, they are honoring a tradition”.
I thought we might get another “Cartoon Yahtzee” with cartoonists drawing the flag on the moon at half staff. So far, I’ve only seen a couple examples of those.