The sewer lid moved slightly,  then a little more, as fingers wormed they're way around the edge of the lid, and moved it to the side.
A filthy and dirty humanoid crawled out from the darkness below, his hair long, bushy, and unkept.
His  clothes were black from the filth where he calls home, and his face was wild, from what you could see underneath the scruffy and scraggly beard.
Immediately he flung his hand up to shield his eyes from the bright sun.
Reaching inside his worn rugged leather bomber jacket, the man pulled out a pair of dark sunglasses, and placed them over his eyes.
He sniffed the air a few times, then jogged off towards some buildings that had seen better times.
Entering one of the buildings, he scavenged for anything useful.
As he reached down to pull a torn blanket from the corner, a deadly viper struck out at him!
The humanoid's reflexes were quick, matter of fact, it was quicker than the snake.
With his right hand, came the flicker of metal, as he sliced the snake's head from its body. 
"Shit."
He smiled and grabbed the body ,placing it in his Backpack, "Lunch".
The crazed looking man scurried off, grabbing metallic objects, wires, and rope if he can find any.
He doesn't know why he does this, but something on the inside tells him to.
That these materials will come in handy for something. 
A few more scavenging junk, then he moves on to the next building ruins.
It is here, that he builds a small fire and prepares to cook the snake.