I've been making a story here's my first chapter

Chapter 1-The beginning 

So me and my friend Zack were walking down the street
looking for some buildings to climb then we saw this one
abandoned building.

It gave us some nerves but we still went in we were exploring
the inside. Then we were walking side by side I pointed to an
unusual space in the building, but he didn't respond I turned
around to see that he’s not there. I yelled
“Dude stop playing around’ and as soon as I yelled I
regretted it. As I yelled I feel a cold arm wrap around
my face stopping me from breathing and I passed out.