Hmmm, maybe 2009 or 2010. I started with 3.5 as a human Cleric, and we played at this place called the Intel Computer Clubhouse. The very first session we were sneaking into a thieve's guild to steal some crown back.

Being our first session, the party split up. I was stuck with a very unintelligent fighter. The fighter and I found the crown in the middle of a wide open hall with no guards. Despite it being my first time playing, I had alarm bells going off that this was a trap. However, the fighter ignored my warnings, and dragged my character right down the middle...into a trap hole. We were dropped into a room that "had a very odd scent". One knowledge check later and I knew the room we were in was filled with flammable gas. Despite me telling him, the fighter insisted on lighting a torch, blowing us both up.

It was wonderfully fun x3