Good, but I suggest connecting some sentences or making them longer―I feel that they are slightly choppy...
Like "For some reason he decided to check it out. He knew whatever was in the alley would only cause him trouble but he couldn’t help it." You can change that to something like:
"For some reason, he decided to check it out; he knew whatever was in the alley would only cause him trouble, but he couldn't help it."
A mistake I found in the second paragraph: "What do you think your doing?” the "your" is supposed to be "you're"
I always do that, too; It's so irritating when I notice them
Again, nice chapter
loved it!