Answer:
What can be seen but not touched?
Spies and detectives do this to phones and musical shoes make this sound.
There is a man in a 4 story building. He jumps out of the window and is unharmed. He used no padding, and had no harm done. How?
Hearing something unexpected or touching a live wire can have this effect.
Doing this with your job can be risky but doing it with smoking is always a good idea
What do you purposefully put lots of in and on your body, but run away from when you encounter it outside?