Layeredfire7229

Question: An electric train is going 50 mph north. It had 20 passengers and 5 cars. Which way did the smoke go?

Question: I do good things, but one small push could be a horrid disaster! I am normally used for decoration now.

Question: I'm in every room, yet outside. I move at different paces, but you never see me moving. Where ever I am its crowded, but when your there you don't see or feel anyone. If you try to hit me you always miss, yet you always feel me. You need me to live, but I cause disasters. What am I?