My reactions to Heartrate. upgrade 1. LOL. look at that ghost, thats so funny how it jumps ;D. upgrade 2. hmmm, its rather spooky than funny. upgrade 3. ok, im ready. no spooky? ok. 20 seconds later: FUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUU
Oh, i get it. If the car is like 25 ft from chopper, he cant go farther without the car. As you already know, without a car zombies can kill you, but with the car, they cant. And the man goes back because you crushed all the zombies from the start.
It was my starting point during design, so you'd be right.