damn dude im always holding my hits in.. i have noticed that on my first blaze of the day(always the best hellz ya) that i can just take maybe a rip or two.. at the most. and be just as high, also without ruining your other smoke sessions. well just hold that in till you feel your eyes gettin all high then blow it out. Also if you swallow while holding your hit in you will take some from your lungs and put it in your stomach, not a good thing to go. i sometimes burp up smoke when i do that