Enthused... Holding hits is a really stupid idea. The smoke doesnt dissapear. It coats your lungs in really nice tar... And makes you cough, which would attract attention. To stop most of the smell comming into your room, poke your head out, take a hit, blow it right out, close the window a little so it dont come back in, and carry on doing this. But i definaly would NOT suggest holding in hits, it doesnt get you much higher, but does help kill you quiker.