I was at school when I almost passed out. My vision started to tint (yellowish), my head was splitting, I couldn't think about anything that wasn't 5 feet in front of me, my head was heavy, my vision started to black, and I almost went out. I just went to the Nurse, who said my bpm and blood pressure was flipping the forget out. It was fun.
When I got home, I literally passed out on my bed from fatigue from the incident.