Oh my goodness, that's hilarious! It sounds like your cat has developed quite the clever (and entertaining) way of dealing with unwanted rodents. "Bam bam bam bam" indeed!

I can just imagine you waking up to those loud bangs, thinking it was some kind of strange intruder or malfunction, only to discover that your mischievous feline friend is behind it all! 

Your cat may be a psycho, but at least they're effective rat-killers, right? Have you caught them in the act yet, or are they still perfecting their door-throwing technique?

(Also, I have to ask: did you name your cat something suitably dramatic, like "Psycho" or "Rat-Thrower"? Or is there a more innocent-sounding moniker hiding beneath this cunning critter?)