Brett loves playing chess; he used to carry his chess set around with him on tour. Once he was in London, trying to get in the US embassy, and they wouldn't let him in with his bag (the British are extremely paranoid with terrorism) so he tucked the bag under a bush in a nearby park. After getting a new passport in the embassy, he went back to the park only to discover that the police had closed it off; there was a Bobby holding his bag and asking whether it belonged to someone. Brett said it was his and the bobby grabbed him infuriated, "Do you realize how much you've cost the British Taxpayer?! You could have a bomb in this bag! open it!". And there was the timer for his chess set. It took Brett awhile to convince the bobby that it wasn't a timer for a bomb but eventually they let him go.
When they were trying Bobby out, Brett heard him play and said "you're in", then "wait! Do you play chess?"; Bobby went "Yeah, kind of" and Brett says "You're in the band".