The scene shows a girl drowning. A boy rescues her from the water. She wakes up while being piggyback carried. The manga has something to do with Rubik's Cubes.
A woman being possessed by a crazy guy with a medallion in this issue. Sara and her partner track him down and stop him. The woman passes out off panel unfortunately.
From Justice League of America, Volume 1, Issue #141 (DC, April 1977) :
An energy discharge from a Manhunter takes Black Canary down. There is a shot of her out cold on the ground, recovering, but still looking groggy (needing to sit). When we next see her, she has been subdued again, and is unconscious. Wonder Woma...
Not an Avenger KO scene this time, but a guest star, Marvel Girl (Jean Grey) from the X-Men! Marvel Girl is found unconscious, and gets cradle-carried.
Avengers, Volume 1, Issue #110 (April 1973)
Source: My Collection
Here is some excellent George Perez art from Avengers, Volume 1, Issues #147-149 (Marvel, May-July 1976). Knockouts featuring the Scarlet Witch, Hellcat, Moondragon, and also Lady Lark of the Squadron Supreme!
Source: My Collection
Cassie Sandsmark, the new Wonder Girl, is attacked by her own armor..Red Robin and Superboy help her get out of the armor, leaving her in her skivies...an old boyfriend shows up and runs off with her costume...leaving her extremely upset..kinda kinky for a mainstream book!
Source: blog
In this self-contained story, Sonja has been defeated by a warrier woman named Raven (not shown, unfortunately), and is tied to a tree. This issue features Red tied up for about half the time..
Source: blog
From the December 1971 issue of Justice League of America -- Black Canary is punched by a mind-controlled Green Arrow, and put into bondage. It isn't technically a knockout scene -- but I know that you guys like to see the Canary tied up!
Source: My Collection
From the February 1973 issue of Justice League of America -- the Black Canary is KOed twice! First, she is rendered unconscious by the "Gamma Gong" (the dangerous device is being telekinetically manipulated by the villainous Hector Hammond). Later on, she gets a squeeze from the Shaggy Man, and passes out in the monstr...