Someone expressing anger will shake their fists to do what?
Options:
- twerk
- illustrate point
- cool off
- punch
- write letter
Let's think carefully first. Step-by-step reasoning process:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
Illustrating point is to demonstrate something clearly. One expressing anger shakes their fists to demonstrate. So the final answer is illustrate point.