Law Abiding Citizen

Law Abiding Citizen is a fast moving action picture that kept me interested, but left a really bad taste in my mouth afterwards.
It starts out looking like your garden variety revenge picture where Gerard Butler vows to get justice after two hoods who murdered his family. Because of a deal with a slick d.a. played by Jamie Foxx, one hoodlum got a minor sentence, the other got the death penalty.
Then it turns into an uncomfortable "Saw" tale about a psycho killer with a conscience.
Butler seems to be able to kill anyone anywhere at will while behind bars as he seeks to bring down the entire criminal justice system.
The movie is totally preposterous the second you apply one iota of thought to it.
It's main goal seems to be to keep moving fast enough to not let anyone think about what just happened.
One of the problems here is there is no one really to root for. But the film actually seems to be on Butler's side for most of it. And you'll be hard pressed to remember anything about this movie afterwards. It seems to evaporate before you even hit the aisle.

"Law Abiding Citizen:" C-