Vehicle player mount

Hi, I've been messing with a Torque Demo I've got. I was able to get the player to mount on collision with the buggy, but when another player or AI runs into the car it also mounts the car. I'm pretty new to Torque and not sure how to check if someone is already mounted on the car. I did see the isPiolet function under the player class, but I'm not sure how to use it. Could anyone help me out?