Somewhat superbly, the “I’m not” line wasn’t actually scripted. It was shouted out by a quick thinking crowd-scene extra. The pythons liked it so much it was ke

Somewhat superbly, the “I’m not” line wasn’t actually scripted. It was shouted out by a quick thinking crowd-scene extra. The pythons liked it so much it was kept in and he was mentioned in the credits. Source - memory from reading one of the pythons’ biographies a few years ago.