I also blacked out once and I'm still not sure to this day that it was LSD. Smoked out some random stranger at a String Cheese Incident concert and he offered me some liquid. Sure. His girl gets out a dropper but she is shaky as hell, so she accidentally puts a puddle in my hand. Being a dumbass, I lap it up like a dog and let the liquid roll down my arm. I don't remember much after that. Well I do remember a little, but what I remember is what I was hallucinating, not what was happening. I made it through most of the concert apparently, although they put me in in this little side area that was kind of like a drunk tank. Then when the show was over I just started yelling "I demand theater." Threw my wallet and most of my shit on the ground (luckily my friend was there and picked it up) and left without my coat in the Chicago winter. Outside I just paced and rambled, then tried to fight my friend who was trying to help me. Cops came and tried to talk me down, but I just rambled non-sense. I tried to shove a cop, but I think they mostly felt bad for me. At this point I was in nothing but a t-shirt and underwear, shaking from the cold. I probably looked pretty pathetic. They were about to taser me, but my friend yelled that he thought I had hypothermia. I did. The cops agreed not to arrest me if I willing got into an ambulance that by now had arrived. By some miracle I agreed and the EMT sedated me. Woke up in the hospital needing to pee soooooo bad. Got treated for hypothermia and a drug overdose. Left with a couple thousand dollar bill (thank God I had insurance at least). Still not sure it was LSD, because that is the only time I have blacked out on L, but it was a VERY high dose.