Lmao. I’m so out of the loop on shit like this. We were assuming he meant heroin because it makes bubbles when you heat it up or something? Dude had us in stitches though - he referred to himself as “[redacted]” which at first I was thinking he was an Instagram rapper or something trying to self promote. Then later we see him and his jacket has a big C on the back, presumably for champagne. The MDMA makes sense because the girl he was with seemed to be rolling- at one point he referred to her as a zombie as she’s all over him 
At some point he made a sort of injecting gesture which, again, I’m so naive about most drugs I have no clue how they’re taken.
In the biggest twist though, I had brought some joints from the Caribbean Crashers harvest to give the people we were meeting, and one to smoke. Well, I totally forgot they were in my pocket after we smoked one of them, and this character later assumes I have weed on me (I probably looked stoned out of my head) and says “I’ll buy whatever you have, especially if it’s flower, but concentrates are good too” and just chucks some money at me across the table. And I’m no dealer, I have no savvy with it and I just sort of haphazardly plop down a bag of joints on the table 
The look on this guy’s face like “can you at least try to hide what’s happening” had me laughing the rest of the night.