Just keep the car running with the garage door closed, you will get a better buzz. I didn't know you got high, you do know that puts a stain on your soul everytime you disobey the lord by altering your mind, right? You probably will look like Pigpen in the afterlife.
I don't smoke as much as I used to, so I'm getting better. It's a once in a while thing now. My buddy and I used to get high and then talk about God for hours::