You Leap Again With The Hammer

You manage to hook the screen off the ventilator. It crashes below and onto the floor.

You can hear the wind pick up overhead. Jumping again, the claw of the hammer manages to bite the side of the shaft and you haul yourself up and through the air duct.

There is a tunnel.

You crawl through and find a fork in the tunnel.

Do you…

…turn left?
…turn right?