Sounds like you can't handle the weed my friend! Ever heard of a rising shotgun? Where you bend over and touch your toes for a minute. Then someone blows you a gun while your rising from the bent over position and as your rising your inhaling as hard as you can until your all the way straightened back up. Then hold that hit in and your head back and a lot of times that will cause you to blackout or see the white light per-se. Some crazy shit!