1. Put on headphones
2. Spot a Zombie
3. turn your left(or right doesn't matter) side to it.
4. Wait for a (preferably long) grunt or moan
5. As that sound clip is going on immediately turn to your back, leaving zombie at your opposite side
6. Sound clip stays on the same side of you, (and if it grunts again as you turn, those sound clips will play on the correct side, making you think you are surrounded by zombies)