I like how the plot is developing so far, I should be working on my paper for class but that will have to wait

Equines can't actually throw up. Other than that this chapter was really good, but you could've milked the Helgan scene more.

The only thing that bothered me, and it could easily be chalked up to "she was too afraid to realize," is that she could have easily unbound herself using magic...

668250 The ponies who ate AJ's baked bads in 'Applebuck Season' disagree

668250
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Other than the fact that these Fantasy Equines have freakin' magic, a range of motion well beyond any actual horse (they can scratch the back of their head, do the math on that little piece of information.), and outlines. I think being able to purge their stomach is much less odd.

But yeah, plotholes are still fun.

You referred to the bandit as "the large man." Wasn't he an orc?
You could say that Twilight doesn't know the word "orc", but she doesn't know the word "man" either.
Still, that's only a very minor nit-pick. I like how this is shaping up so far.