Zombie Apocalypse

Dave is first priority right now. You run a few steps into the forest where a small groan could be heard. Dave! Dave's hand poked out from behind a mulberry bush. Dave? His lifeless body lurched towards you knocking you forcefully onto the dirt. His eye sockets stare blankly at you and Dave lunges at you again. What is happening? You run towards the car and break the broken window to make enough room to climb inside. Dave starts to reach his arm out at you, swinging it viciously. This is not Dave.
"I need something!" Dave's car is only filled with restaurant receipts and his wallet. Nothing. There's nothing to do. Dave slowly reaches in deeper, tightening your chances of escape. No weapons, nothing but fear.