Yeah, I watched that too, the guy had to mortgage his house to afford it, it leaked when they were parked in the middle of one of the tornadoes, and the cops only pulled them over to say hi and good luck, but to his credit, it worked.
Best part of the show was when they had a couple of redneck amateur storm chasers with a little toyota pickup and a tornado device they had made from scratch, it was designed to film the inside of a tornado, but when they managed to get it in the path of one they had the cameras set on autofocus so they filmed the water droplets forming on the glass, not the actual tornado, which passed directly over it.
Signature? We don't need no steenking signature