I am going to be attending my 1st Muay Thai class tonight (free) to see how I like it. I am a pretty athletic guy (played soccer all my life) but very out of shape and generally haven't been taking care of myself too well aside from working out at the gym (weight training). What can I or should I expect from my first class? I'm a little self-conscious going into something w/zero exposure to aside from watching MMA and K-1. I am hoping that I don't die from a lack of conditioning and stick w/this as I think it will be a lof of fun. I guess if anyone has any positive/negative experiences or general advice it would be much appreciated.