Answer:
I run up and down the stairs without moving. What am I?
I can be thin but not fat; in your body but never on your placemat. I'm always better when I'm fresh but you'll never see me in the flesh.
If lightning strikes an orchestra, who is most likely to get hit?
I am Invisible Man's drink at snack time
I make you weak at the worst of all times. I keep you safe, I keep you fine. I make your hands sweat and your heart grow cold. I visit the weak, but seldom the bold. What am I?
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.