This video, prepared by the Dairy Science Group at the University of Sydney, demonstrates (without harping on the fact) the value of maintaining a calm tone when narrating a documentary about using a robot to herd cows:
(HT Frank Swain)
BONUS (somewhat related): The 2013 Ig Nobel Prize-winning study “Are Cows More Likely to Lie Down the Longer They Stand?” Bert J. Tolkamp, Marie J. Haskell, Fritha M. Langford, David J. Roberts, Colin A. Morgan, Applied Animal Behaviour Science, vol. 124, nos. 1-2, 2010, pp. 1–10.
BONUS (more distantly related): CNET’s report about a Cornell project based on the notion that it’s important to engineer a knife-wielding robot’s motions in some way that keeps humans calm. Here’s video from Cornell:The YouTube ID of uLktpkd7ojA#t=22 is invalid.