That’s gonna hurt in the morning
Seeing Jiu-Jitsu throws done without mats reminds you how much that would hurt if the person didn’t know how to land properly, or it was done on concrete. The above video shows some excellent technique demonstrated in the sort of throws we train in BJJ. It’s on a sprung wooden floor, but still, that’s going to hurt.
Before he started Tai Chi my Tai Chi teacher trained like this in a traditional Japanese system of Jiu-Jitsu back in the 1970s. They didn’t use mats – they just had a wooden floor. These days we’ve realised what the negative long term effects of this sort of training are, and we use mats, but it’s good to see somebody demonstrating it. I’m just glad it’s not me!