I remember how "wrestlers" on television in the old days would hide something sharp in their tape wrist wrappings and cut themselves to heighten the drama for the rubes at home that truly believed pro wrestling was real. It's the same today with those that believe MAGA is real. My tinfoil hat theory is that his ear was nicked by a piece of the prompter when it was hit. That, and the sketchy, rather miraculous way his ear shows no scaring now puts it in the realm of possibilities that this was indeed staged, but the shooter evidently changed the script.
What are the odds he suddenly experiences sudden spontaneous human combustion? His arms are a little too short to be boxing with God.