Cow attacks in the movies

They showed the film 50 First Dates on Channel 5 this evening.

I'm no expert in these matters, but I'd describe it as a downmarket hodge-podge of Groundhog Day and Eternal Sunshine of the Spotless Mind featuring Drew Barrymore and a bloke who looks a bit like Ben Stiller, but if you pay attention, it turns out that the poor lass lost her memory because she crashed her car swerving off the road to avoid hitting a stray cow.