I was watching some video that was about some Americans that went to do muay Thai in Thailand. They were invited to train at Fairtex (Bangplee location?) in Thailand. In the video they showed the fighters kicking this big heavy bad that sat on the floor. It was pretty huge. It sat on the floor, so it didn't move. You could just kick, kick, kick, kick and it wouldn't move at all. I like that. Has anybody seen those before or know what I'm talking about? Anyone know where these things can be purchased?