Well that sounds pretty enjoyable. I had a similar experience at Bonnarro in, I think, '07.

I'm thinking back to my freshman year in college. I remember me and a few of my buddies were in the same class. We all had a fairly sizable project due the next day, it was a programming course. We went out behind the science building, got stoned, and went on to try and complete the project.

It didn't work. I remember spending an hour staring at the computer screen, trying to concentrate. Borderland's C++ compiler has never made so little sense. I'd work out the individual components of the program, how they should work, but couldn't get beyond that abstract step.

I've had similar problems with calculus and linear algebra.

A few years later (I dropped out of College, I'm back in as a journalism major now) I was working as a roofer. I was working for an astounding stoner. The second day on the job, we all smoked up, and ended up making some pain in the ass mistakes.

That said, I was also ridiculously irresponsible at the time. In an effort to work out the meaning of life (no shit) I spent most of my time stoned, lit up, or drunk. It is remarkable that I never got in an accident at that time, and very lucky that I never killed anyone.

Those are the ones that immediately come to mind. It might sound like it was the collection of substances I was ingesting that caused these mistakes, but these examples are pot only.