He not only has a vicious energy that perfectly helps you understand why Jamie Foxx’s taxi driver Max is so terrified of him, but he also takes care of his jobs very effectively and realistically (albeit with a few issues driving the plot along the way).
Regardless, one can assume that the work was effective in giving the actor the perspective he needed for the part, as he delivers one of his best performances as Vincent in Collateral — one of the few times that he’s played an antagonist in a film.