There is a suspicion that for the author of this concept, the grandmother's cuckoo clock always carried a certain sacred meaning. At least, this would explain the reasons (besides the obvious ones - to surprise and entertain) the appearance of the concept “jumping man”. However, to hell with them, with the reasons. This idea , which will never really see the light, is simply awesome.
At the time set by the user, the doors open, a little man leaves them, spreads his hands and, with a shout “10 hours! Iiiii-haaaa! ”(It's 10 o'clock. Heeee-Ha) sig down on the elastic wiring. Practical value does not bear any. But how happy. I would not refuse a watch with such a modern cuckoo (after all, the idea may well be borrowed).