A female undercover officer is given either too much alcohol, or a drugged drink.

Female police officer is tasered from behind. The last two panels are an unrelated unconscious scene I found.

Minako is kidnapped while walking on the street. She faints in the process. Did I mention she likes to sleep a lot for some reason?

A girl faints after bumping into a boy at school. The boy kind of goes crazy seeing the sleeping girl.

A pair of young girls pass out from too much alcohol. No drinking kids!!!

Some women are gassed in an Egyptian Museum. Found by MoryoX.

Two girls get into the back of a car, and subsequently get gassed. Found by MoryoX.

Minor head KO in the first few pages of volume 1. A big jerk knocks a young girl out, and tries to rip her swimsuit off!

Buffy knocked out via a plank of wood. Wakes up tied to chair. KO is a bit violent for my tastes.

This manga is about a girl who is really small. She's like the size of a doll. In this scene, she gets plucked off a ledge by a kitty. She's knocked unconscious in the process, and some animals try to eat her.

Yuki gets knocked out in a blast. Not a very good scene, since there's only two good panels.

There's like three KO's here. The woman wearing glasses seems to be a villain. She uses a tazer twice to knock out two different girls. After knocking out the second girl, the woman in glasses gets knocked out herself, via an injection to the neck.

Catgirl Himari is possessed by a demonic entity, and it renders the her unconscious. The boy, Yuto Amakawa, carries her away. Yuto is later seen carrying two cute girls (probably rescuing them). He crash lands onto the grass, and the girls momentarily faint. He ends up groping them by accident. Lots of fan service. ...

Girl on girl fight here. The protagonist uses a piece of clothing to suffocate her opponent. A little nipple slip here, but it's okay :-)

Just one image here. The cover of this comic features LiveWire (Mandy) being cradle carried.

Minako Sasebo is the main love interest of the penguin (who is a reincarnated boxer). Funny romantic comedy. Anyway, she likes to sleep a lot, so here are some cool finds.

A beautiful 'angel' falls from the sky, and lands unconscious in front of an awestruck boy. In the same issue, a cute girl in a school outfit is handcuffed, for some reason.

A girl named Kanako is kidnapped by an older man, who makes her sniff a bottle of chloroform. Found by MoryoX. Source: http://www.mangahere.com/manga/dynamite_milk_pie/v01/c000/70.html

Another unknown scene. A girl wearing a weird hat is kidnapped. Please help identify it! Found by MoryoX.

Madam Holmes is kidnapped near the Statue of Liberty. She is taken aboard a big ship. She is the great-granddaughter of Sherlock Holmes. Detective manga. Found by MoryoX.