The 'Battle of Pearl Harbor' sketch was filmed on location in rural North Yorkshire where there was no proper facility for washing off after the mud fight. On this cold winter day, the Pythons had access only to an outhouse with cold water to clean themselves off after filming. They had most of the mud still on them during the drive back to London.
The only lines that Jimmy Buzzard (John Cleese) says are "Good evening, Brian," "Well, Brian.....I'm opening a boutique," "I hit the ball the first time and there it was in the back of the net," and "I've fallen off my chair, Brian."