Prima Facie,” which opened Sunday night on Broadway, the audience is hit by two wildly different sensations.First, as we become fully absorbed by the harrowing story of Tessa, a brilliant young barrister whose life is horribly upended, there is great pain and sadness in watching her go through a trauma nobody should ever have to experience. Some viewers will be understandably overwhelmed by it all.One hour and 40 minutes with no intermission.