To get rid of the small metal machines, use a waterarrow and ame for the red on it's back, then fire the arrow, and it will go out (while saying "error error".
Don't do it if there is a large machine in your area... it'll hear it, and you're in a world of touble.
Machineheads a dumb. Get in under it, even if there's a fireingstatue right next to you... nothing will happen.
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