Cat remarkably startled by harmless object

A very sneaky zucchini somehow manages to scare the stripes off Plasma the cat. It's okay buddy, it won't hurt you!
Marius the cat gets completely spooked out after noticing a harmless cucumber placed behind him. Feel free to share your thoughts on why cats react in such a way.

Chuey lost her battle with jaw cancer, so her owner showed her to Big Boy, his other cat, so he wouldn't go outside looking for her and get lost or hit by a car. She actually hated him, and didn't let him get close. This is the closest he ever got to her. The next day he was back to his normal, happy self. Such a heartbreaking moment!