The Secret Triwizard Challenge

You decide to play it safe and skirt the edges. You run to the wall of the maze and put your back to it, ensuring you're watching the spider as you shuffle towards the exit.
You're about 3/4 of the way to the exit when the spell finally disintegrates. The spider falls, hissing and spitting. Thankfully, you're hidden in the darkness of the maze's edge, and the spider hasn't spotted where you've gone. It begins searching.
You're so close to the exit. What do you do now?