What behavior might a cornered Black Racer exhibit that mimics a rattlesnake's warning?

Answer

Rapid vibration of the tail against a vibrating substrate

When pressed against surfaces like dry leaf litter or gravel, the snake vibrates its tail rapidly, creating a buzzing sound intended to mimic a rattlesnake's rattle.

What behavior might a cornered Black Racer exhibit that mimics a rattlesnake's warning?
reptilecharacteristicsnakeracer