I move into the room to the south.
Even with your leg frozen in some sort of alien metal you can manage to crawl into the room in the south as the vibrations build to a homicidal pitch. Once inside you curl into a ball and press yourself as close to the ground as you can, waiting for the inevitable.
EDIT DUE TO POSITION:
*Ahem*
Feyri blinked after staring for quite some time at the room. It's utter simplicity baffled her. In all her life as a mercenary, she couldn't understand why there was an empty room in a structure. Surely, it would have some use later on, but that would have to wait as she heard the cries of her allies behind her.
She left the room and peered around the corner to see Faith and Milno run past her. Followed by a cry of pain that sounded like Ivan's voice.
"What in good blazes-...Jim let's get out of here!"
Jim was ever the observant fellow, keeping his calm at times like these. Feyri wished to emulate his example soon, but feared that her training and perseverance would overwhelm her tranquility. Well, there were some things that made people different from each other...
Slide under that Sentinel while firing two short bursts of three second fire at it's underside. Jim will be of aid here, of course.
Shout that we mean no harm!
[Dexterity roll: 5]
Your teammates are in trouble, an automated alien menace is bearing down upon them with what you can only call a death ray, and they are scattering like frightened kittens in the face of a 40 foot, diesel powered pitbull. Are you a cool enough dudette to save them? Hell yes you are.
Without pausing an instant you grab jim's body and sling him toward the sentinel, sending the body skimming across the ground like a corpesy hovercraft. You ready your rifle and sprint forward, the pain in your leg forgotten. You leap and land on the skimming corpse, riding it forward in a completely metal powerslide, limboing under the Metal Sentinel.
"we mean no harm!" you shout as you open fire.
[con.Wep. Roll: 4+1] The invisible beam of your weapon slices into the metal sentinel, shearing off a large section of it. The severed section falls to the ground and collapses into fine silvery dust. The remaining part of the sentinel seems to shiver and the vibrations become erratic. You finish your powerslide and launch yourself up, jim in hand, and roll into the room the sentinel emerged from. You feel like you should light up a cigarette or slowly put on some sunglasses or something.
"THE PYRAMID! TRY SOMETHING WITH THE PYRAMID!" Faith shouted, jumping into the room it had been resting in and withdrawing her own dodecahedron. Glancing out of the room, she held it out in front of her, hoping for any change in the sentry.
If not, she ducked back into her room, hoping it was a hidey-hole and not a dead end.
You dive into the room Milno found the pyramid in and dig your artifact from its pouch. You lean around the corner and hold it out, waving it in the general direction of the sentinel. You decide it's not working just as Feyri launches herself forward at the horrible alien thing, and dive back into the room, covering your head.
Milno:
Follow Faith and...uh...try something with the piramid. Intuition, go!
((Now I think we should wait for Tiruin/Feyri's post, because we may need someone who can shoot a gun in this scenario.))
You follow faith into the room where you found the pyramid and look at the thing floating near your hand. [intuition check:1] Yep, thats totally an alien can opener. Nothing else it could be.
>Bravo To Feyri for being the first to SHOOT THE HOSTILE ALIEN ROBOT. 1 extra token to her next mission.