It doesn't matter that the charges were dropped. He was still grabbed, forcibly restrained, handcuffed, forced into a car, taken to a police station, fingerprinted, had a mugshot taken and thrown into a cell with a bunch of other random people who could be in for god knows what until either he could call a lawyer to straighten things out or until he made bail, which means waiting for a bail hearing, whichever came first. Oh, and they take all your stuff and barely feed you or give you anything to drink, and often times there's nowhere to sit, and the toilet is in open view to the public.

I'm sure you'd have absolutely no problem whatsoever spending your afternoon and evening this way after a 20 hour flight from China.