One day while doing hang cleans, after I had finished my set, my throat almost completely closed up. I was wheezing for a good 3-4 minutes, struggling hard to get air in. I workout in a non-climate controlled gym and it was probably around 85-90 with 50%+ humidity in there. I was on 100mcg of clen that day. Also was cramping really badly that day. Dont know if it was clen related or not (could've been from the high intensity excersize and the heat/humidity) but thought I'd throw that out ther.