one of the most tense and infamous nights in recent Hollywood history after Will Smith abruptly walked up stage and slapped Chris Rock following an insensitive joke about Jada Pinkett-Smith's hair.MORE: Jessica Chastain leaves fans on the edge of their seats as she unveils exciting new projectMany stars in attendance have spoken out about the shocking moment and what it was like to witness it, as well as its aftermath, with Oscars host Amy Schumer calling the altercation "traumatic."Jessica Chastain is the latest celebrity to speak out. She won her very first Oscar shortly after the infamous slap for her role as Tammy Faye Messner in The Eyes of Tammy Faye.WATCH: Jessica stars in The 355 alongside a star-studded castMORE: Jessica Chastain’s monochrome jumpsuit was a masterclass in red carpet styleSpeaking for a recent cover shoot for Net-a-Porter's Porter magazine, the actress opened up about how the room felt."It was a weird night," she said, despite her major and long-awaited win, which was unfortunately overshadowed by the instant viral nature of the slap.