You guys are missing a very special technique involved in huffing down that oh so yummy n2o.
The best way is to buy the big crackers...The ones that people actually use for whipped cream. Do not get the little tiny one that can only be used for inhaling nitrous, actually I doubt you'll find the latter since they're being removed from markets because of the obviousness that they only serve one purpose.
The good thing with big crackers is that you can empty a bunch of whippits in it, before you empty them in the balloon. Start with two...Empty two carts in the cracker and shhhhhhhhhhhhhhhh it into the balloon. Now take as much as you can, you won't get the whole balloon, unless you have awesome lungs...Stop inhaling and say something dark and demented. Without inhaling fresh air, just exhale, take the rest of the balloon, now you can exhale into the balloon and keep going in and out and in and out.
Here's the trick...When you're doing the in/out stuff towards the end you start to hyperventilate(breathe faster)one time when you're hyperventilating, inhale and hold your breath...Hold it for a long time, a long time. When you feel your lips start to get cold and your whole body seems to lift out of itself start hyperventilating again, then hold it again...Your body gets even more cold...Keep going, soon you'll blackout and fall backwards and you will love every minute of it.
Some may say I'm crazy for doing whippits this way, because the cold feeling you get in your lips is actually called suffocation and when if you push it too far, it's very possible that you might not wake up. Oh well, we all die. But I do it this way not because I have a death wish, but because I have been passed out for ten minutes of one whippit doing it this way. That's right, ten mother fucking minutes. Usually you only pass out for 20 seconds on one, I was out cold for ten minutes and the for the whole ten, I was feeling it. Tell me that's not awesome. Good thing I was alone because if I would've done that around others they would've been thinking I was dead, and actually I was...I was in that state of being alive and thinking you're dead. I think the cold lifted feelings was my sould going out of my body, a true out of body experience from my friend nitrous oxide, I love you n20... I love you!!!