That was an interesting story. I looked up the cockroach theory of panic and found that it differentiated "reaction" from "response", with "reaction" being a better form of action in these circumstances. I think that if you "panic", then you can only "react". The "response" can come only from someone who doesn't "panic". I actually saw this happen many years ago. We lived in a terraced house in a village and next door was a cafe with a cockroach problem. The cockroaches used to squeeze through the walls and into our house and one day, my mother put on her cardigan and was informed that there was a cockroach on her back! It had been on the cardigan before she put it on. I never saw anyone dance so fast, turning round and trying to look at her own back to make sure it wasn't crawling up towards her hair! I got a shoe to knock it off but had to yell at her to stand still before it could be disposed of!
I actually like most animals but for many years had a dislike of cockroaches, probably from this. It took quite some time before I could look at a cockroach in a microscope and admire its form. And did you know that they can squeeze themselves as thin as a sheet of paper to crawl into tiny spaces? They are quite amazing - but I still don't want to share my house with them. :)