From the pages of "Superboy and the Legion of Super-Heroes", Volume 1, Issue #207 (DC, March-April 1975) -- Light Lass gets karate-chop KOed, while Shrinking Violet is shown unconscious (the actual KO was, sadly, off-panel); but she looks really good getting tossed around by Superboy, who has been mind-controlled into attacking his sexy comrade!
Source: My Collection