Perhaps it is significant that when I saw this film in a movie theatre in NYC I was the only person in the audience. Maybe not.
Jim Broadbent as Da has seen a ghost and is convinced that he will die if he falls asleep. Comic relief fails to describe his antics to stay awake.
Cillian Murphy as Michael McRea hasn't quite put away childish things. When he fails to repay a loan from Mr. Perrier (Brendan Gleeson) his thugs -- nasty people, they are -- are relentless in their pursuit, and one ends up dead from McCrea's gun by his ex-girlfriend (Jodie Whittaker) who really stole it to off herself, things get more than a bit crazy. Then there are the pit bull owners, the gay man bent on avenging his dead partner, and other Snatch- or Lock Stock and Two Smoking Barrels-like weirdosities that Perrier's Bounty tries hard to emulate. And it sort of works.
Since I would pay to watch either Murphy or Broadbent read the telephone directory I rather liked Perrier's Bounty. I think you will, too.