It's possible that the bleeding may be foreshadowing the severe radiation burns that over time gnawed away at the flesh on his hip, calf, left shoulder and left arm, the areas of his body that had come into contact with the door. If he did bleed, it would have had to have been due to thermal burns from the fires, steam burns, or where the hot steel door came into contact with his skin. However, in exploring the truth about Chernobyl, we learned that radiation doesn't do that. For example, Alexander Yuvchenko, the man who props open the door to the reactor hall in the HBO miniseries, begins to bleed excessively in patches on his body.