Zombie survival question !?!?

Okay soooo you're in an armored Humvee drivan by a military guy in the front . The only way out of the city is through the forest . Zombies can ambush you any second now ... The road is Rocky , and unstable . The car hits any bumps that would hurt . Sooo a question : do you pit on your seatbelt ? If zombies break into the car it can mean confinement to your death , so make your choice !!!