In an effort to save his life ...
after executing the "perfect bluff" to win a monster pot from a disgruntled poker player who was on tilt and known for having a terrible temper, threatening serious bodily harm to anyone trying to steal a pot from him, the winning player was forced to dive under the table while grasping a hand full of his chips, banging his head on a nearby stool, thus opening up a cut on his forehead, bleeding onto the chips, causing the stains, when he narrowly avoided being hit by the chair thrown in his direction. The disgruntled poker player was politely asked to refrain from further violence, to which he responded to by saying, "What? ... You mean throwing a chair isn't allowed???? ... What the hell ... I missed him anyway, didn't I?"
The winning player quickly left the game and was last seen walking away with a handful of blood-stained chips!