What is the most rattled game you've seen a team play?

Not necessarily the biggest blowout or upset but a performance where a team just looked mentally broken.

The Nebraska Colorado game sticks out to me this year, especially the first half. Stadium was electric and Colorado seemed unprepared for that environment. No control over the LOS, Shaduar was seeing ghosts and multiple arguments and tantrums on the sidelines.

What other examples stick out to you?