I like this one. That being said, a few issues:
In the first and third paragraphs, you state that there in a human effigy atop it. I would get rid of the mention in the first paragraph; it's just redundant.
I feel like this one is cut off early:
- Scary Robot, cool
- Human effigy, cooler
- Crazy shit happens when it isn't well maintained, awesome
- Potentially lethal scream, slightly cliche but still cool
- Crazy shit includes….machines turning on. Neat, now what do they do?
- Run.
- So?
- …that's it.
See what I mean? You have a cool foundation but you don't quite build on it. At first I thought this was actually a giant automaton, and was expecting it to run around all giant or something, which would have admittedly been pretty cool (if a bit too Gundam-esque). Point is, you need to up the creep in some way. Withholding vote for now.