Bikram Yoga... Break my back more like

So, I started Bikram Yoga. They were doing a New Year's deal because everyone's put on some pounds since the holidays and made all those crapy resolutions. It was a 20 quid for 14 days thing, which is pretty worth it considering a drop-in session cost 15 pounds alone. I went with my sister to to one of they're many sites in London to register and feel out the place. Bikram yoga is no more strenuous than Ashtanga yoga, which is what I normally do, except you don't have some guy telling you to relax your anus, ^_^. The postures are different and in the 40 degree celsius heat it's particularly hard; not only are you stretching and tensing all the muscles in your body, you're also trying to do it all while breathing through your nose AND sucking your stomach in. You go in looking like this...

...but you come out feeling like this, lol.

You sweat bucket loads even if your technique isn't that good.