Awesome...from the video, the Jet Pack is not like the one in Reach, it is very short bursts and takes a bit of time to regen. SWhich is good, cuz Jet pack in Reach was OP. I am glad the regeneration field is back from Halo 3. The Sentry turret didnt seem to do much in the video, perhaps they will tweak it. I am very excited for Halo 4