To put it bluntly, he was getting a taste of his own medicine.
He was extremely terrified, and he was afraid that Charlie would also open up a big hole at the top of his head.
His only consolation was that Charlie did not know anything about raising a parasitic worm, and he did not own any native parasitic worms of his own. Otherwise, if Charlie were to let a native parasitic worm bite into his skull and devour his brain, Falco would certainly have to suffer and go through torture that was wor