I did it exactly five times between the ages of 19-20. Three on a little ranch we house sat during the summer and then two more at our place in the U district. Day time trips were a blast. We threw a turbo nerf for hours on 42nd and 12th and made friends with the house full of hot chicks next door. We all had good arms and, if you've ever played with an original turbo you know this, you can throw those things a mile and they come in hissing. When you're on acid you can see them hissing rather than just hearing it. Fucking cool.
The last one was a drunken, 3am impulse...2.5 tabs of some nasty shit my friend scored a half sheet of at a Dead show. That one was rough and I was never tempted to do it again. Sitting in a basement apartment watching Goodfellas at 5am while uncomfortably high is no place to be.