Captain Marvel Jr #85 (The CMJ Repeller) May 1950

Captain Marvel Jr's genius is on display: "Later, the mighty intellect of Captain Marvel Jr. grapples with the same problem." He thinks, "Smoot devised some kind of spray that makes physical bodies react magnetically away from me! First I got to learn what the formula is! Then I've got to discover an antidote!" There are several other CMJ stories using the same principle (CMJ #31, CMJ #84). Artist Joe Certa uses a multi-image panel showing CMJ "Flash like" rebuilding a car (page 2 panel five). Mort Meskin used this technique on his Johnny Quick strip at DC comics.