Answer:
I saw a strange creature. Long, hard, and straight, thrusting into a round, dark opening. Preparing to discharge its load of lives. Puffing and squealing noises accompanied it, then a final screech as it slowed and stopped.
Don't do this in the shallow end.
What is the heart of many risks, has a heart, but is not a living being?
What surrounds the world, yet dwells within a thimble?
When they are caught, they are thrown away. When they escape, you itch all day.
What covers its face with its hands, speaks no language, yet most known what it's saying?