I say quit drugs because you aren't responsible enough to do them! Wow, this forum is getting worse and worse with irresponsible idiots.
Take a cell phone and have the # for a cab company. Bring an extra $20. If you're still tripping when you leave the concert, don't drive. It aint worth it. Even if you don't fuck up, karma might get ya. As in a drunk driver killing a loved one...don't fuck with karma.
I have a friend who drives while tripping all the time. One time me him (A) and another friend (B) were driving in his speedy wrx while all tripping face on shrooms and ecstasy. We're going down some highway, with daft punk's "rollin' & scratchin'" BLASTING. Suddenly A pulls the car over without saying anything, on the highway, opens his door and begins puking. Meanwhile, semi trucks are driving by, and B starts freaking out, worried (with good reason) that a cop will drive by and we'll be fucked. After about 30 seconds of puking, A closes the door and continues driving, B calms down, and we return to driving. They both turn around (I was sitting in the back) and ask how I was able to remain so calm during this crazy situation (the entire time I was sitting with a huge grin on my face, bobbing my head to the song). My reply "this song is REALLY good on ecstasy" there's no moral here, if you ever do ecstasy fucking listen to rollin & scratchin In all seriousness though, driving while tripping is DUMB. I think anyone who's made the mistake will agree. Fun? maybe. Retarded? definitely. People who DIDN'T SIGN UP FOR YOUR TRIP can get hurt. Nuff said.