Answer:
What can one catch that is not thrown?
What can you catch but not throw?
I make a loud noise when changing jacket. I become bigger and delicious.
You see a boat filled with people. It has not sunk but when you look again you don't see a single person on the boat. Why?
People see through me, but none pass through without killing me. I can be anywhere, and can be seen double or single. What am I?
What language does a billboard speak?