I took Vicodin (hello captcha) once before school and puked in first period. Thankfully I had excused myself to go to the bathroom so no one was around. I just said I was "sick of school" and got sent home for the day. That was the only time it happened so nobody was the wiser. I loved the stuff but, aside from one prescription for wisdom-tooth surgery, I only ever got it from raiding the family medicine cabinet from old surgeries. It was old so nobody noticed (I threw out the bottles after finishing each); thankfully, having a limited supply of the stuff, and taking it paranoidiacally (don't think that's a real word), spacing it out, I never got hooked.