Just stand and push, or take a seat and chillax. It will take a while but once something comes out it comes out.
Even if it is only two poots and a dribble, you will feel relieved, you will drop 3 or 4 more MDMA's, you will go the bar and buy 2 bottles of still water, you will down one immediately and keep the other one safe, you will get your spot back next to the biggest speaker on the dancefloor.
You will then look randomly at one of your friends dancing, you will suddenly be overcome with the realization of how much you actually love them and how you just appreciate them for exactly who they are. The music will suddenly gain more depth and sound like nothing you have ever heard before, even if the song playing has been your ring tone for a year it will sound so different, so much better, you will close your eyes and actually feel the music within your entirety.
And then you will feel that feeling rush over you, that magical feeling, that most amazing feeling when an hour's worth of newly created Serotonin reserves have been building and building and building and then finally released all at once, the Serotonin will flood into the spaces between your neurons and they will just stay there, they will just float around freely working their beautiful magic, the Serotonin molecules won't be broken down, they won't be immediately reopsorbed into the post-synaptic cleft receptor sites, they will just remain within that 50 nanometer space for at least 2 hours and cause you to fathom heaven and truly experience infinite love
Oh my soul I miss MDMA now. It was the best experiences of my life. Ever. Nothing compares or comes close, nothing, fuckall, no other chemical or natural state, nothing.