His mind felt like it was blowing apart.
Literally, because he could feel the bullet piercing the bone of his forehead, tearing through his skull, ripping his brain into shreds until he couldn't think anymore.
That was not something he considered a problem. The problem was that he felt his mind was blowing apart, figuratively.
Velez had addressed him as The Immortal. As if he was some incredibly dangerous villain who had allegedly killed a third of his men. That wasn't him. Even with his quirk, he wasn't technically dangerous, just survivable, impossible to kill.
The discrepancy, the absolute certainty with which Velez spoke those words. He had definitely seen Rhett, carved him into his memory like a scar.
But Rhett didn't remember any of that. When he probed his memory for any such recollections, he came up blank, and his head throbbed furiously. He couldn't wrap his mind around it. How could Velez see something that he couldn't remember?