My dad just called it arc welding. He did welding for a living for 5 years, 30 years ago, I'll have to ask him for sure. It was pretty neat to watch, actually. We pulled out this power box, plugged it in, attached the ground clamp to the hook and then put the welding rod thing into the other clamp(which seemed more like a handle than a clamp) and then dragged the welding rod thing along the hook pieces and whammo.
Speaking of Mortal Kombat, I have recently been using the same line that I mentioned earlier to do that one move that scorpion does with the rope and the kunai into the chest, I can constantly fling this all-steel scissor blade into a tree, if that counts.
This hook isn't so much for scaling buildings as it is swinging from point A to point B. It hooks into trees really well, works best when used in the same fashion as the grappling hook from Wind Waker. I haven't done much with it yet, it was pretty dark when we finished.
You should have asked your father if he has an angle grinder.
Welding is so badass. I used to watch my uncle weld stuff in Texas. If i ever become rich some day, I will most certainly be a part time blacksmith.
Why would you need to be rich? You could create your own forge and tools.
Here's the forge I made about five years ago. It's kind of half-ass, but it was an experiment. I only needed it to serve one purpose. I used the forge to melt silver for casting jewelry.
The picture quality sucks because the pictures were taken with my Nokia 6682. It got hot enough to turn 1/4 inch rebar cherry red on the low fan speed.
As for welding, it's not expensive either. Look on Craigslist for some used welding equipment. Don't make the same mistake as the poster above. Wear protective clothing because the burn is HARSH. Also, weld outside and use a respirator if possible.