The smell will probably escape if your worried about that. Otherwise I've always loved smoking in small spaces like closets or cars. You won't really get any higher because there is little thc left in exhaled smoke. It's also probably a lot worse for your health and could possibly make you light headed.
haha! I just totally pictured a black kid hotboxing and KO lmfao if you could see the thought in my head.. nah your not gonna pass out
Don't try to pass out or anything, but if you smoke in a tight-ish space and you get a little bit lightheaded, that usually feels pretty good when you're stoned.