Try Your Luck With The Worm

You bite your lip and think "Hmm I have NO idea what this thing is. Its big and its slimy. And i really need to keep going."

As you step up to the worm, it seems to sense your presence and stiffens a little. You pause to watch it.

A small row of knobs appear along its back, right at the top. You inhale a little at the sight of them appearing.

You swallow your pride though and step exaggeratedly over the worm. As expected though, your legs are too short to clear it. You are falling onto it!

You hope the worm won't mind you landing upon it, but that row of ridges sure looks inviting.