I'm a little late with this week's Gil Kane punch, so as an added bonus, I'm giving you a Green Lantern tag team on the villain Captain Challenge from "Thoroughly Modern Mayhem!" in Green Lantern 61 (June 1968) written by Mike Friedrich and drawn by Gil Kane and Sid Greene (reprinted in Showcase Presents: Green Lantern, Vol. 4).
I also declare "Thoroughly Modern Mayhem!" to be the Gil-Kane-Punchingest story of all time!