The troubled 26-year-old then leapt into his 'getaway vehicle' – a bulldozer with a top speed of 15 mph.
The 'getaway' was so slow that a three mile tailback built up behind the man.
The bizarre attack took place outside a Hells Angels clubhouse near Munich.
The student, who had recently ceased taking his medication for depression, wore only a skimpy pair of shorts which he then dropped.
He was arrested at his home after abandoning the bulldozer outside Allershausen.
A police spokesman said: “This is the first ever recorded case of attempted suicide by Hells Angels.
“It is unclear why he did what he did but he must have known it was a near suicidal act. He was really lucky to escape unharmed.
“The puppy is now being cared for in a local animal shelter.”