This is odd, it definately doesn't stop my roll but it alters it significantly.
I find that mixing MDMA and weed can be a VERY Psychadelic experience. To the point where the thoughts in my head don't even construct words, just noise and jibberish. It can be very good and very bad.
I smoke often, yes. And it was hella dank, it was chronic to the max. w00t NorCal weed :D
I've smoked during rolls a few times, never to a great deal, it definately alters my roll, but doesnt by any means bring it down.
What you best off doing is saving your dope for the comedown, total and utter mind fuckingly awesomeness ensures. My favourite feeling in the world (asides from our beloved MDMA peak ) is the post pills smoke up with friends, all sitting around my lounge recovering from a big night out, passing a bong around and trying to make our words string into scentences, failing miserably, and laughing our tits off at each other in the process. Life is complete, amirite?
if you're roll was killed from smoking, you didn't take enough E dude... i usually experience increased euphoria, increased tactical sensations, increased OEV's and CEV, more psychadelic and better all around...Omg weed and e sucks, i did the same thing on my very first roll, smoked 2 joints between me and a friend, I got baked as hell but the e was completely killed.
haven't tried it.
i love how clear-headed e is, and i don't want to muddy it up.