This may be the funniest cat video I have viewed -- it's hard to say because there are so many. This video shows a cat that is intrigued and very curious about the noises this computer printer is making. He stands on his hind legs and leans in close to take a look and then starts slapping it over and over until he falls off his stool. His face shows a mark at the side of his nose, it may just be his coloring but, given his inquisitive and aggressive personality, perhaps it's an injury from a previous encounter.
If you enjoy this type of video you will also like Marcus versus the HP Deskjet Printer. Marcus shreds the paper as it comes out of the printer.
For more laughs, here's Bad Cat: 244 Not-So-Pretty Kitties And Cats Gone Bad and also lots more cat humor books, t-shirts, calendars.