Knowledge is power!
For how ubiquitous air travel is there is still an air of mystery revolving around how planes work. The result is a rumor mill of fact and fiction floating around on what could go down while traveling in a plane.
For example, a common fear is that a plane door can be opened during a flight, or turbulence is a sure sign you're going to crash, yet another is you can get stuck on the plane toilet if you're not careful. All of which land in the fiction category.
Which rumors are legit? The folks over at The Travel put together
15 Rumors About Flying (That Turned Out To Be True), that highlight some of the stuff you should be aware of. Give it a full read here.
Happy and safe travels everyone!