Answer:
Weight in my belly, trees on my back, nails in my ribs, feet I do lack. What am I?
A trail, a union, together tied. Come across me and you will find you cannot change the course I'm on. Without me you cannot travel on. What am I?
I'll bring out your bulls and slow your roll. I may even come out of your skull.
I suck.
I sit in a corner while travelling around the world.
What never gets any wetter no matter how hard it rains?