Picture the scene - a fully-grown adult male in a smart shirt and tie, excitedly leaving work at the University at the end of the day, the campus still bustling with students.
The adult male is so excited by the start of the weekend that he doesn't realise, until having walked a considerable length of Library Road, that the stoopid muddyfunster has been air-guitaring all the fracking way.
I must have looked like Ted's Dad in Bill and Ted's Bogus Journey.
Post-script - "berk" is such a beautiful, innocent British word, dontchathink? Until you learn that it derives from Cockney rhyming slang for "Berkshire Hunt"...