D
The bible never mentioned being slain in the spirit. When a person is slain in the spirit, someone (pastor, minister, etc.) lays hands on them, and they fall to the ground. I believe God takes over and they cannot control it and falls, I guess. It's a rather interesting phrase.
My dad, a very practical man, (chemical engineer level of practical), was slain in the Spirit. Nothing changed except it amused him it happened to him too.