Not enough character building from my first little glimpse at the prologue, without any explanation of the protagonist and his life/name he's immediately thrown out, same with Bryan, there's no elaboration on who he is or his story or anything like that, otherwise it's pretty good.

Edit: Though this is always something you can go over in a different chapter, if you're bringing the main character and his friend into the picture in the prologue then there should be at least a little bit of buildup.

I could hear Bryan cheering me on from the other room, and then everything started to spin. I think I screamed out something. All I know is the next time I woke up, everything had changed...

Welp, 'scuse me while I summon all my years of English classes and go into full-on editor mode where hopefully I know what I'm talking about. *AHEM*

I have to agree that what this is missing is the character development. If we're gonna be following him around a whole novel, we need to know who he is. Personally, I'd recommend describing how he feels more. Let us into his head. What does he think of his conversation with his mother, the very first thing we see him doing? Is he pleasant with her or annoyed by her restrictiveness? Does he want to teach his brother guitar or or does he feel like his brother's bothering him? These are little details, but the snippets of emotion you give us are how we understand this person and relate to him. Same with other characters like Bryan. You can show us how he reacts to losing the race to his brother, for instance, or give us a quick conversation between him and the narrator to show how they interact.

Right now most of the story is PLOT PLOT PLOT PLOT PLOT. This happened, that happened, just sequences of events. In fact the first three sentences in the first full paragraph begin with "I [past tense verb]." I ran. I took. I went. It feels a bit mundane and monotonous. Unless that's the kind of feel you're going for, try changing up the syntax a bit. Rearrange words so the sentence structure is varied. Throwing in those characterization moments will help break things up too. And one more thing: The first time I read this part I barely even noticed something was happening. C'mon man, gimme some of that prosaic description! Make me feel the shock and denial when things start going wrong! The confusion and disbelief at what's happening! Unless this is the kind of guy who stays calm in a crisis, in which case you can still demonstrate that, show his logical thought process as he tries to figure out what's happening. Whatever works best for whoever you want this character to be.

Well, that might have been a bit overboard, but I hope it helps! Good luck on this story, Agent!

I read it before church. It's interesting enough to read. I'm not a big writing critic so I'm not gonna add anything else.