Another Sun Tzu strategm in action?

Stomp the grass to scare the snake (打草驚蛇, Dǎ cǎo jīng shé)

Do something unaimed, but spectacular ("hitting the grass") to provoke a response from the enemy ("startle the snake") to have them give away their plans or position. Do something unusual, strange, and unexpected to arouse the enemy's suspicion and disrupt their thinking. It is more widely used as a warning: "[Do not] startle the snake by hitting the grass". An imprudent act will give one's position or intentions away to the enemy.