McAdams backs his car into Nico’s car, causing substantial d…

McAdams backs his car into Nico’s car, causing substantial damage. Enraged, Nico jumps out of his car and physically attacks him. Nico sues McAdams for the damage he caused to the car. McAdams files an answer to Nico’s complaint with a _________ in which McAdam sues Nico for the damages he caused him, which resulted from the same incident.