I have a friend, somewhere in Colorado, who has a Maine Coon who regularly causes alarm and consternation about a 'mountain lion' loose in the area. He's big even for a maine coon, fluffy so he looks even bigger and is a rich golden sandy colour...

Anyway she was calling him one time, about dusk, and thought she saw him off in the trees aways.. until he headbutted her from behind!

Needless to say, they went indoors darn fast.