i'm guessing alcohol was involved...

Police use Taser
to subdue suspect
Police used a Taser to subdue a suspected drunken driver who refused to get out of his car during a traffic stop in Ann Arbor this morning, city police said.
Officers said the man made an improper right turn on red from Main Street onto westbound Stadium Boulevard shortly after midnight, and they attempted to make a traffic stop, reports said. The man continued driving to his home in the 1400 block of Kirtland Drive, where he pulled into his garage.
Police approached the man's car, and he said he couldn't understand why they were in his driveway, reports said. He refused to get out, and after an officer told him he didn't want the situation to get physical, the driver replied, "That's fine, let's rock,'' reports said.
Officers attempted to pull the man from the vehicle, and as he fought, one officer used his Taser, reports said. Outside the car, the continued to struggle and was shot with a Taser a second time, reports said. He then agreed to comply.
The 30-year-old man was taken to the University of Michigan Medical Center, where blood was drawn to test his alcohol content, reports said. He was released pending charges.