Snack #1: Fear in dance, and drums

A human lesson:

While dancing Zouk with a great dancer, I noticed that whenever I did something she wasn't sure about, she "froze" - her muscles tensed up, she even stopped her breath for a second.

I could call this excitement more than fear, but the surprise element in combination with excitement created a fear response.

What if I created an exercise to stimulate a fear response in follows (by leading something safe, yet unexpected), and then analyze what were their fear responses: Freeze, Flee, Fight or Faint?