Intensely personal and original, Lewis' films were groundbreaking in their use of dark humor for psychological exploration. Justin Chang of the "Los Angeles Times" said, "The idea of comedians getting under the skin and tapping into their deepest, darkest selves is no longer especially novel, but it was far from a universally accepted notion when Lewis first took the spotlight. Few comedians before him had so brazenly turned arrested development into art, or held up such a warped fun house mirror to American identity in its loudest, ugliest, vulgarest excesses. Fewer still had advanced the still-radical notion that comedy doesn't always have to be funny, just fearless, in order to strike a nerve".