Answer:
In a tunnel of darkness lies a beast of iron. I can only attack when pulled back. What am I?
I have a strong affection for belly buttons.
What jumps when it walks, but sits when it stands?
When you are inside me you will be encouraged to slam other cars.
I go from house to house a messenger small and tight. Whether it rains or snows I sleep outside at night.
What made Cyclops quit teaching?