Knight-mare Hare is a 1955 Warner Bros. Merrie Melodies theatrical cartoon directed by Chuck Jones and written by Tedd Pierce.

[2] Bugs Bunny is reading a book about the Knights of the Round Table when an apple falls and hits him on the head; it transports him back to the time of King Arthur.

When he wakes up he encounters a knight named Sir O of Kay, Earl of Watercress, who challenges him to a joust.

Successfully returning to his own time, Bugs encounters a farmer with a plowhorse resembling Merlin's transformed state.

The cartoon is available on the Looney Tunes Golden Collection: Volume 4 DVD box set.