At first I was wondering how Joe and Danny didn’t know Robo-Vac’s origin even though they were fans of the character.  But then I realized that, well, this is the vintage first issue, so maybe the origin’s been rebooted and refined a bunch of times since the “classic” era.  But then I counter-realized that Tom Hoover pretty obviously owns a 1997-style desktop computer right there in the fourth panel, so I don’t know anymore.