Tucker Carlson quite clearly just had a sleep paralysis [1]. I had one too. Scared the shit out of me when it happened. Since you can't move or breath and the hallucination of a robed figure sitting on top of you is really vivid. Quite interesting the human brain chooses to conjecture a hallucination which is about the same for everyone who experiences it.

[1] https://en.wikipedia.org/wiki/Sleep_paralysis

When I get sleep paralysis, I either see shadows or aliens (the typical Hollywood grey ones with big heads) surrounding my bed.