I throw myself inside as quick as possible, then turn around and yank Dune in with me

Dune tumbles in after you. Scrambling back up, Dune looks around, The door! We need to close it up! Wheres the door?
You remembered holding it earlier; it must have dropped...

I immediately start looking for the door, which starts to get frantic

After a few seconds, Dune drags you away, "Were dead, were dead, were so dead, come on, let's just get out of here!"
Holding onto your arm, Dune sprints off.

I start running right beside Dune, now terrified

Dune stops, panting. Emerald green eyes darting, he pulls you backwards and into another tunnel. Before you can cry out, he clamps his hand over your mouth, the other hand making a 'shhh' symbol.

I calm down and gently remove his hand from my mouth, remaining quiet.

Dune flashes a weak grin before narrowing his eyes. In the dim lighting, you can see him mouthing a countdown.
Four
Three
Two

I try to remain as quiet as possible and wait to see what happens when he gets to 1

One, Dune mouthed.
Through the fog, blurs silently strode past, though you could only see their feet from your position. Dune nodded.
Moonwraiths
Dune bot his lip and began counting again.
Thirteen
Twelve
Eleven
Ten
Nine
Eight