Ok this is an old one from 2005 so involves Don Muang Airport rather than Suvarnabhumi Airport, so anyway, my mate makes his way to the Bangkok airport with his massive overstay, we all know it is 500baht per day and a maximum of 20,000baht, pretty easy to remember for the thickest of people, sadly Thai immigration don't make the grade on the thickest people.
So a quick run through of what happened, he gets to the airport and checks in then goes to pay his overstay, the Thai immigration officer spends a long time working out how many days it is due to there lack of mathmatic skills, I still remember my father applying for a 365 day visa, well it does fuking say how many days, the fuking idiot got the calendar out and was totally suprised it was a year, anyway back to the airport scum, th Thai immigration officer worked his fine out to like 60,000 odd baht, yet the maximum fine is 20,000baht, so he handed over the 20k baht like a good man that he is, he was quite shocked to hear from Thai immigration officials that they wanted more money, so being the nice chap that he is he told them to go fuck themselves, yep, Thailand and thais are great, only if your fucking them.