Answer:
My teeth are sharp my back is straight to cut things up it is my fate.
I am the kind of food monkey likes and people slip on me and fall in cartoons.
I give people a huge fright, but at the end I'm sweet. I normally celebrate at night, when there's less heat. What am I?
You cannot keep me until you have given me. What am I?
Used left or right I get to travel over cobblestone or gravel. Used up I vie for sweet success used down I cause men great duress.
The answer I give is yes, but what I mean is no. What was the question?