THE HISTORICAL RESEARCH BEHIND MONTY PYTHON’S ATTACK BUNNY. The dangerousminds post also mentions the killer bunny in Monty Python and the Holy Grail.
It occurs to me that Terry Jones, one of the Pythons, is a medieval scholar (the author of WHO MURDERED CHAUCER?: A MEDIEVAL MYSTERY and CHAUCER’S KNIGHT: THE PORTRAIT OF A MEDIEVAL MERCENARY). The killer bunny in the movie was based on the authority of manuscripts.