Harley is given an injection from behind while at the beach.

Bookworm gasses a young librarian.

I miss teh old days when Scarlett was helpless.. and they brought that back with this cover! Source: online somehwere

Nika Chaikina, the best thief in the world, is caught in an explosion which knocks her out. She wakes up handcuffed to a chair. Her captors release her briefly, before injecting her with a sedative.

Source: http://ac.qq.com/ComicView/index/id/623751/cid/76 Contributed by Nephenthal

Fantasy doujinshi. An adventurer named Clarisse is tricked into waiting in a room inside a mansion. She's knocked out with sleeping gas. Original title: (ToreTama002) [AlberCorp. (Alber)] Clarisse no Sonzaikachi | Clarisse's Value (Granblue Fantasy) [English] {Doujins.com}

Agent Bea and Secret Squirrel get captured and knocked out with gas.

An original drawing by me. Space Ace rescues his girlfriend Kimberly, the damsel in distress of the video game. https://www.deviantart.com/sleepy-comics/art/Space-Ace-Rescues-Kimberly-756861172 **** Enjoy my work? You can now support me on Patreon: https://patreon.com/sleepycomics . Thanks! ****

A female secret agent finds herself trapped in a room with sleeping gas. Full name of the doujinshi: [Segami Daisuke] Youshoku no Ma Cultivation Room (Nakadashi Haramase Anthology Comics Vol. 7)

Vampirella faints during a blood transfusion. Many panels show her unconscious.

Vampirella and a female actress are led to believe they are part of a casting call. The villainess is an actress who wants to relive her glory days. Vampi and her female companion get injected by the chairs they are sitting in.

A girl with white hair, wearing a kimono, is kidnapped by some masked female assailants. Source: http://ac.qq.com/ComicView/index/id/629088/cid/31

Story is set in ancient China. A group of guards kidnap and knockout a female. Source: http://ac.qq.com/ComicView/index/id/621525/cid/3 Contributed by Nephenthal

Hino Hitomi goes to change into a swimsuit, to complete part of a race. A pair of chimpanzees surprise her with a cloth soaked in a sleeping drug. Update: the anime now has the exact same scene: http://clips.sleepycomics.com/clip/edit/murenase-seton-gakuen

Source: https://www.97manhua.com/chapter/1534965.shtml

Source: http://ac.qq.com/ComicView/index/id/550162/cid/227

An original comic I created with artist "serialkidnapper". Sailor Mercury is tricked by into thinking a Youma has appeared. Little does she know, it's a trap! **** Enjoy my work? You can now support me on Patreon: https://patreon.com/sleepycomics . Thanks! ****

While not a KO, poor Moonstones costume is more or less blasted off her.

The Alpha Flight girls are Ko'd.

Stellar is KO'd in an overwhelming attack by multiple baddies. A surprisingly good scene from a modern comic.