Don't snort MDMA...
I really liked this movie, but one thing that really bothered me is the way the consumed MDMA.
Please don't snort MDMA because you think that's the way you saw they do it in this movie. MDMA is no coke. Just swallow it or take it in pill form. Have a drink on the side though, because pure MDMA tastes horrible. Be ready to flush your mouth with water, to get that nasty taste out of your mouth.
Also don't rub it in your gums. Unless you want your teeth to fall out and go for the teethless hobo look. This also applies for all other drugs. It's one of those things Hollywood often does in movies, but retarted at the same time.