Me and my brother used to fight when we were younger. Real fighting. People would actually wind us up so they could witness our fights. One involved ripping hole in a tent in France after some friends had spurred us on and caused us to have a fight. A massive one that my Dad had to come in and separate after the friends had got scared and gone and got him. Another involved a pool cue to the face and a dumbell to the head. We laugh now, but we were vicious. It only stopped when he got big and it was clear that I would die.
The last time we had a fight was in Madrid after a particularly hairy night in a dodgy club just near his apartment just before I moved to Japan. We threw each other around the room. I spent the next 2 days projectile vomitting. Then his apartment got broken into and my stuff and all his unopened birthday presents got stolen. The night of the fight I'm almost certain there was more than just tequila in the shooters. Infact, scratch the 'almost' - we unanimously agreed on that.
Anyway, I actually quite enjoy a good scrap, which is why I had a go at the Israeli self defence technique 'Krav Maga' on Saturday. It was fierce. In terms of conditioning it is amazing. In terms of stress release that is a little different to the gentle stress release of yoga or the funky stress release of hooping. It is violent stress release. I have bruises up and down my arms and let me tell you, the Swiss girl who I partnered with was strong man, and focussed and full on. We sparred and took fake stabbing attempts at each other with fake knives. I had a look in my face like a mad attacker. And I made all the noises really loud.

Now before You start getting a bit worried about all the violence, in terms of exercise this has it all. You have to be very tough mentally and physically, you will get fit very quickly as there is a strong cardio element and above all else, it is useful. You are learning how to defend yourself quickly, effectively and with strategy.That's something I feel could potentially come in very useful.
In Madrid.