I would call it a very quick lesson in physics. If something doesn't exist, how can it be causing pain? It's very visceral. People can go as far as denying thei

I would call it a very quick lesson in physics. If something doesn't exist, how can it be causing pain? It's very visceral. People can go as far as denying their eyes if facing with evidence they don't like, but very few will deny touch. An engineer ought to know better than to disrespect reality like that. A bit of pain in training, can save you a lot of pain in the field.