I was going to say "Lay off guys, it's just an interested person who doesn't know how packs work. If we all have this attitude, it's little wonder why young people aren't interested in aviation."
Then I clicked on his profile...
You might want to clear that up on your profile, sky-738. If you're just starting the ground school, or if you're a flight-sim pilot, it's okay! I don't mind. Just don't confuse people into thinking you have a B737 type rating.