Threw up after weed, gum, cig?

My friends and I were out last night, and we smoked like 4 bowls in the car, just driving around. Then we stopped in a parking lot, and I smoked 2 cigarettes. Then I had a piece of gum, and we got back in the car. Then I threw up... Uhhhh why??? Really confusing. We smoked another bowl and I felt ok, but any reason?