I havent seen a whole lot of aikido either. I knew it was aikido because they were wearing hakama's. And I knew aikidokas fall down a lot

and i know what aikido teaches. But havent seen a whole lot of it which is probably why my first reaction was,
Wtf is he tryin to do, break his arm?
As Bruno said, many systems, particularly the traditional ones, wear hakama. But, in reference to the bolded section, uh, yes. Yes he was. That's kinda the point of the technique.
To clarify, as he obviously was controlling it to the point where he wasn't breaking the arm, the way things have to be trained is with the mindset of their application. When I perform something in training, my intention is for it to do it's intended job. Last week I taught a technique using a hanbo called Koshi Ori, which translates as "Break the Hip". So, when I went through the kata with my students, I made no bones about the fact that that is the aim of the technique. In fact, I went to pains to point out that the weapon we are currently focusing on (the hanbo, a three foot stick) is a bone-breaker. That's it's entire job, as far as we're concerned.
In this particular kata, it involves levering the stick between the opponents arm and lower back in order to take them down onto their back, and following them down to the ground. I pointed out that the initial movement is not the "breaking of the hip" part, it's when they land (with their hip) on the stick on the ground. And I made sure everyone took it to that point, in order to get a feel for how the technique works... but I had them do it slowly, and gently, for safety, mainly due to the relative inexperience of the group. However, if I had not taken the kata through the way it was designed to work, as I didn't want to "hurt" my students and training partners, and not had the intention of having the kata work the way it was designed to, I might as well have gotten two much smaller sticks and started knitting, as that would have had as much relation to the art.