Der Springteufel

Der Springteufel (in english: devil-in-the-box) is the protagonist villain of the german comedy movie with the same name. He's played by Dieter "Didi" Hallervorden. A man takes a hitcher with him, but the hitcher does such stupid things that the driver is almost crazy. It turns out that the hitcher is a psychopatch called "Springteufel" (because of his devil-in-the-box) who escaped from the asylum. At the end, the police think that the driver is the "Springteufel" (the driver was already hysterical because of the real psychopath) and take him to the asylum.