Uh..., there maybe should be a limit to the things you experiment on your garage.

When I worked at Radio Shack, we found an old plug-in electromagnet in the back and started playing with it. We started messing with the computer monitors, cause in the early aughts we were still using greenscreen POS tills, and so we about half-ruined some of those, and then I thought it would be cool to see what it did when brought close to the body. Got it a little too close to my head, and felt pretty weird for a few minutes after some momentary skull numbness. I still don't have an adequate explanation as to what I did to myself, but it hasn't hurt me none; I can still read the writing on the walls.

He should build an armored suit and fight a bear.

I want to know what his day job is. Because if this is just his hobby, holy shit!