Im just wondering as I was reading some stories recently that there are some crime cases in Europe used Sleeping gas un able to knockdown the victims, I remember long ago there was a same cases in Manila like taxis using spray to unconsious the victim, and some uses a piece of clotch and place it on their face, it is the same like insecticide that we normally used? coz one of my housemate told be that he got knckdown after spraying some kind of insecticide brand last week.