I was roofing in the sun but keeping hydrated. I got severe cramping in my hands and my lrft arm contracted ineo my dhest. I couldn't open my hands or lower my arm for about 15 minutes. I am 59, 5'7", 250 lbs. Later that night I smelt verystrong cigarette smoke, but no one in the same room smelt anything. It felt like a severe, multiple charlie horse, but I feel fine now. Was it heat stroke? I had a Tilly hat on.