At 0:45 in the trailer it looks like a broad-shouldered character near the doors in the background is *deliberately* unleashing a facehugger onto the character in the foreground.
They don't seem to react at all / flinch to the facehugger leaping around, so I presume this is deliberate, and they didn't let the hugger into the room by accident.
Oh - and maybe an Easter Egg - at 0:49 when the Ripley-esque character stands near an archway, the wire pattern on the archway above her head and slightly behind her is (half) the shape of the octagon self-destruct countdown computer screen used by Mother in the original Alien film