Things got bloody in Rome ... but it's all for the cameras, with actor Andrzej Chyra going full method as Pope John Paul II . Check the video -- the acclaimed Polish star was deep in character for the upcoming historical thriller "Santo Subito!" ... recreating the 1981 assassination attempt and dramatically collapsing after the "shot," fake blood splattered all over. The scene's no joke ... packed with extras to mirror the real-life moment when Mehmet Ali Ağca opened fire as the Pope entered St.