I've never owned a corn-loving cat, so I gotta wonder if it's something genetic.
Mashed potatoes, on the other hand...

As someone with a half-cattle dog, I'm going to add to the "does not like" randomness:
-horses (??)

My guess on the last two is that it makes someone move "unnaturally" at a quick pace, and she's a bossy hall monitor at all times. I have to grab her leash when we're out running if I see someone on the path with those, because she will try to slow them down or stop them. But she doesn't have issues with bikes, so *shrug*.