"Where the hell did you get grenades?" The prisoner is no longer kneeling, because Shepard has him by the collar, partly for intimidation, but mostly for more efficient dragging as she muscles him around the corner and into cover. His buddies don't seem to care about collateral.

It only takes the man a moment to weigh the odds between potential retaliation and immediate terror. "Not grenades. S'a power."

Great. That means they're not going to run out.

"Your cooperation is appreciated." Only Shepard could say that right now and mean it...but it doesn't stop her from shooting him with a stun round from her pistol, and his expression of confusion at her apparent sincerity melts into blank unconsciousness.

She pops her head around the corner again as her personal barrier springs into existence around her, the shimmering biotics combining with Sawtooth's blue light to the point where the glow is enough to read by.

Then, grinning, she charges.

Unless there's a Daxamite hiding back there, this is going to be quick.