No answer came back after Greg knocked at the door, "Well I've knocked" he thought, seconds before pulling out his gun and busting the door open, Carter had shot the knob down with several shots, and kicked the door open, as it swung open Greg didn't storm in giving Carter a head start. As Carter stormed in, Greg made sure no zombies were following them, except for the two slow walkers approaching from a fair distance. 

"Clear" notified Carter. Greg swung the door shut and propped a chair onto the door, making sure it kept the door shut. The place wasn't so filthy as Greg anticipated. Zombies nearly made their way through that front door, it wouldn't last, but the windows are much fragile, no zombie seemed to swoop through it yet, mindless those things are thought Greg. 

When all the sudden one of the survivors rushed down the doors, aiming his gun at Greg and Carter, as he lowered his gun he mentioned a escape plan, "zip-lining", Greg is Acrophobic, he would rather face a firing squad rather than falling from the top of a 6th story building, nevertheless he had to do it in order to survive. They rushed through the stairs, Greg was getting nervous by the minute, his sweat scented the air about him. 

At the roof the private conjured an idea Greg would never think of. A zip lining was ready in a matter of moments, crafted from the most unorthodox components, a spear replica and a wire. Greg approached the ledge, looking down he swallowed hard and exhaled in worry, trying to grasp his breath. He took a few steps back as the private clung a plastic tube and glided down to the neighboring building. 

Greg was suddenly dizzy, about to puke his intestines out. "You guys go ahead, I'll be right behind you." He mumbled trying to put words together, trying to calm his stomach, he sat on the gravel and let out a burp, leaving his throat sore.