Look­ing at this gal­lery, I noticed that the pic­tures were not photoshopped.

After a little search on the inter­webs, I have even­tu­ally found out the author of those per­form­ances: he is actu­ally from Switzer­land ((Of course he is one of the Ger­man-speak­ers)), and he has a nice web­site that you can check out.