Hobo with a Shotgun
(2011)

The Hobo (Rutger Hauer) kills Slick and takes Abby (Molly Dunsworth) to the hospital.

Drake (Brian Downey) calls in the The Plague who abduct the Hobo and sets him up in Drake's spectator blood sport.

Abbey arrives and threatens to kill Ivan (Nick Bateman), but Drake ends up shooting him anyway. Abby kills one of the Plague duo, but Drake throws her hand into the lawn mower, ripping her hand into a bloody stump. She breaks free, and stabs Drake with the exposed bone from her wrist. She helps the Hobo up just as the police arrive.

The Hobo kills Drake but it shot dead by the police, even though the spectators all fire back in retaliation. 

Thanks Ali D!