system
Given the following post, respond as if you're commenting on Reddit:
human
[Halo] What exactly does a gravity hammer do?

To me it appears to just be a big hammer smashing people and has very little effect in the gravity. It lights up and makes a loud noise so it's doing something but what?
gpt
Gravity hammers are equipped with a gravity field generator that can emit a kinetic pulse which lets it affect gravity in a small area. If you've been lucky enough to see a gravity hammer in action, you might have noticed it often results in those nearby being pushed away from the point of impact, and if you've been unlucky enough to see what happens to a person who is unfortunate enough to *be* the point of impact, you know that the damage is considerably greater than what would be possible with an ordinary, if very large, hammer. 

Of course, how exactly the generator works is a matter of debate among academics as any working gravity hammers would be in ONI's possession and they aren't particularly fond of publishing the results of their studies, but the lighting up and loud noise is assumed to be part of the ordinary function of the generator.