The most extreme job interview I have been to was for a barman at London Bridge railway station quite a few years ago.  I was given an IQ type test which became progressively more difficult, though I managed to score well.  At the end I was told that I was not the type of person they were looking for as I was likely to get bored doing a routine job !

When I was applying for a position of economist I was asked by a potential boss if I ever learnt music, I said I had learnt playing piano in childhood, then I was asked to play and when I refused, he teased me. Then he asked what was my zodiac sign, I said Scorpio and he answered that Scorpions always destroy a working team and he would never hire a Scorpio. After a few months I got know that he and my superior were friends and my superior asked him not to hire me. That's why this interview was just a joke for them both.