Alright, so I made my first gravity bong (which works incredibly well) a week or two ago and played around with it with some salvia just to see how well it worked, since I had no pot at the time. then a few days later... Sunday my friend Mandi comes over and brings some mids and we decide to smoke out of the gravity bong. The bowl is a small metal socket. The container is a large almost 3 liter apple juice bottle. Anyways, I forced myself to clear the chamber on 3 of the tiny bowls, and I very quickly got very fucked up. That was probably the fastest I've gotten that high. It was great at first, but soon after I got one of the worst fucking headaches I've ever had. This drove me crazy, because I used to get intense headaches as a kid, and I can't stand them. I tried to sleep it off, and when I closed my eyes I kept seeing very vivid moving geometric patterns. It wasn't very detailed full color images or anything, more like outlines in a neon/static kind of color. First time I've ever seen anything like that from smoking pot. I couldn't enjoy it though, because of the headache was was now causing nausea. The headache lasted the next 7 hours. I couldn't get anything done because I felt like my head was going to explode... similar to a really bad hangover after a night of drinking way too much liquor. Anyways, that's my story. I'm kinda wondering why I was seeing patterns like that with my eyes closed, as that's never happened to me before. Maybe something else was in the weed. I don't think so, but who knows... I probably would have enjoyed it, if the movement of them hadn't been making me more nauseous. meh. anybody else get bad headaches or see shit from hitting gravity bongs? I like how effective it is for amount of weed used and how quickly it can get you blazed, but I don't want to deal with a headache like that again.