I took MDMA at a party where about half of the other attendees were rolling too. Instead of redosing with more MDMA, I wanted to try taking 2C-B once I stopped peaking on MDMA. I took 1 pill (advertised at 25mg, probably more like 12mg), and when I didn't feel it after 15 minutes, I took another 2C-B pill and a small MDMA redose. This was a dumb idea, obviously, but I blame my MDMA-comedown brain.
I started tripping really hard and felt like I was freaking people out by staring at them for too long. Some of them looked amused and I started thinking that maybe I had peed myself or taken my clothes off without realising it. They were probably just laughing at how hard I was tripping when everyone else was chilled out. I left to go and sit in my friend's bedroom and basically spent the rest of the night on my own, thinking I'd done something embarrassing but not knowing what it was.
Lessons for next time: stick to one pill, give it time to take effect, and don't trip at a party where nobody else is tripping!