Sports psychologist Charlie Maher calls 'freezing' etc, 'misplaced focus'. It's when a player, leader, student, or parent suddenly (there's usually a 'button' that has been pushed) and inexplicably is incapable of performing a basic move, remembering what has been studied, or behaving like the leader or parent, that is so basic to who they are. Charlie calls it the 'yips'. Some people also call it a 'brain freeze'. Whatever. In that moment we lose our sense of higher purpose, and are driven by short term outcome alone. That is the time to stop and refocus.
Gunilla Norris says: "Within each of us there is a silence as vast as the universe. And when we experience that silence, we remember who we are."
Then we can be our best.