'Mercy For None' review: One-punch gangster is a one-note wonder

'Idiot! Chairs only work for lion tamers in circuses. And you're just a clown.' Photos: Handout

Whenever South Korean beat-'em-up extravaganzas are mentioned, one would think Ma Dong-seok aka Don Lee has all the other stars ... er, beat.

Not so fast. We can now add rapper-actor So Ji-sub (Doctor Lawyer, Sophie's Revenge, Be With You) to the pantheon of screen bruiser demigods.