Seriously:
http://www.youtube.com/watch?v=MvRTALJp8DM

*starts stocking up on crowbars*

good news is that a bullet would put it out of commission more easily then in half life 2. It probably would break easily too.

That's awesome!

Insane. Only word that can describe this.

I just hope these things turn on us. I want to smash some.

I would love to torment my cat with one of those!

Very impressive. I wonder how much time it takes to learn to pilot one? Or if you could make a life-size quad-copter to fly in irregular places with people inside...

very cool. Though a bit worrying if a swarm of them was heading to your location.

I have a nice big crowbar hanging on a wall since they started that LHC thing, and i saw Gordon Freeman on a picture near it. :D

Awesome video. That is one agile little bugger. Now, one of the comments made me LOL though:
"Yeah no one would ever weaponize that, we're not totally fucked at all."
I am sure that is what most people are thinking anyway, but it is how the guy stated it that made me laugh.

Well, weaponizing this toy does present two serious problems: how do you get it to fly into things and cut them without:
A: Breaking, or
B: Falling in such a way that it cannot right itself?
A remote controlled "Chopper" is not a bad idea, but firearms are a lot more cost-effective.

I see this as a nice delivery platform for covert-strike biochemical weapons; small, agile, fly it in the meeting rooms vent system and release the gas.

I wasn't thinking of manhacks, precisely. How hard would it be to put a 9mm on one of those with a couple dozen rounds? Granted, with a gun on board (even with ceramics/polymers involved), it won't be nearly as agile, but it would still be virtually silent and very maneuverable.
On the other hand, that thing looks way too light to even fire off one round without major stabilization issues. Something heavy enough to handle the recoil isn't going to be able to dart about like the video shows. I suppose one could carry a grenade or something, but where is the fun in that? So, never mind, I guess... at least until someone invents some real laser gun technology.
EDIT:
When I say laser guns, I mean something like the PASS in this article, but shrunk down to the size of of a pistol. Seems pretty far fetched, but so would an iPhone to an electrical engineer 50 years ago.