The problem with working with animals is you never know quite how they're going to react in different situations.
Michael Fassbender knows this better than anyone. While filming Jane Eyre, Fassbender explained on The Graham Norton Show on Friday, that his horse Prince caused more than a few interruptions on set.
"He used to get quite aroused," said Fassbender. "Whenever I got on his back."
Fassbender went on to describe how the on-set "horse handler" would have to take Prince for a quick trot to calm him down before filming could continue.