[sblock=movement] If you're doing nothing but Run, right? It's a full-round action. If you pick up your Backpack, that's a move action. Do you want to keep your backpack or run?
But yeah, full-round action to Run. And I believe you can move through an ally's square, too, so if someone's slower than you are.
I'll... need to double check on the swarm vs. movement. I don't think it is, though.
Come to think of it, unless a Swarm can take a run movement, you may be able to escape the range of the swarm. hah! Joke's on me. I have to go to work, but I'll double-check my notes on this homebrew-baddy when I'm done.
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