I've been doing muay thai for over a year now, and i've been thinking i'm getting pretty tough. I attended my first bjj lesson on saturday, and let me just say...wow. A guy the same weight as me was beating me like i was a child. He would do things like, "hold me down, don't let me up, punch me when you get a chance". 2 punches and 4 seconds later i was in an armbar, and had no idea how i got there. The entire day pretty much went like this. When he tought me what he was doing, i was amazed. Amazed at how a little shift in the hips when you're in guard can give you the reach to get a leg over someones head. I watched a few fights today and really paid attention to what they did on the ground. I have a new respect for this aspect of mma.