Answer:
Hearing something unexpected or touching a live wire can have this effect.
Deep, deep, do they go. Spreading out as they go. Never needing any air. They are sometimes as fine as hair
I'm a god, a planet, and measurer of heat. Who am I?
What has a foot but no leg?
Glittering points that downward thrust. Sparkling spears that do not rust. What is it?
What is lighter than what it is made of?