I watched an NCO in Viet Nam do that, but he went one step farther. Since we had no welder, we had no welding rods, either. He used a regular wire clothes hanger and a can of powdered flux. It wasn't the smoothest weld ever made, but after some cleaning, it did the job.
Rat, I learned that trick about 30 years ago when I was in the Army. Not the best repair job, but works as a field expedient repair to get you back to the shop.
Iddee: It was probably the same NCO that taught me that trick.
It's simply that our brains are like computers: as we grow older our brains replace Random Access Memory with Read Only Memory. That's why we don't know the names of our co-workers, but we can sing all the verses of Leader of the Pack.