I also had that kind of problem...only i didnt throw up. It was a mix of sleeping pills (2) they are my friends prescription ones and about a gram of weed smoked. I ttok the pills waited 30 min when i started feeling them, smoked the gram of weed in a bong and one joint. Then i went inside and once i got to the couch while i was still standing i got the "blackout" feeling coming on but i didnt blackout. instead i went blind for about 3 minutes. All i saw was the colors and shapes like when ur eysight just starts to leave. Then i regained eyesight and went nearly def for a couple minutes. Then i was fine. It was fuckin scary. I never mix that shit anymore. Has anyone done thatand had the same problem? It was a cool trip afterwards though. Man was i fucked.