Answer:
These are the bumpy parts of your digits
It is something you will never see again.
I look at you, you look at me, I raise my right, you raise your left
What has black spots and a white face, is fat not thin, and helps you to win, but tumbles all over the place?
Hearing something unexpected or touching a live wire can have this effect.
I am a room that has a roof but no walls. What am I?