Keeping in mind that a theory we subscribe to can influence the way in which you see or interpret something, it still seems as clear as day to me that something exploded under his shirt. The audio is persuasive also - you see the shirt puffing before you hear the sound of the explosive charge and see the wound. No-one wanted to believe it at the time, now more and more are looking at the intel agencies that have been unmasked as the actual deep state.