An English IKEA decided to release 100 live cats overnight. Why? Why would you question such a thing? The video is the most amazing and life-affirming event. Ever. Embrace it. Watch it a thousand times. Watch it ten thousand times.
As far as I can tell, the team at the wooded dorm-furnisher extraordinaire just let the cats run around the empty store completely for the hell of it, and the results are simply wonderful.