Johan Lorbeer is a German street performer. He became famous in the past few years because of his “Still-Life” Performances, which took place in the public area. Several of these performances feature Lorbeer in an apparently impossible position.
From wikipedia:
Although this trick seems genuine, it is not magic. He manages these positions by hiding his actual arm under his clothing and the ‘arm’ that is seen sticking to the wall is a support bar.
Interesting :)