I found this excellent article on considerations concerning your typical airline pre-takeoff passenger safety briefing, to which no one listens anyway. There is a good reason for all the emergency procedures briefed before each flight, and George Hobica learned them by attending a British Airways training course. As a career pilot, I knew most, but not all, of Hobica’s presented points. If you travel by air, you owe it to yourself to read Hobica’s article.
One quick addition to the article that Hobica hints at it. The flight attendants are not primarily present to serve food and drinks during the flight, nor to try to passify unruly children. Their primary role consists of safely guiding the evacuation the aircraft on the ground and dealing with inflight emergency situations. In other words, they aren’t primarily servers, but safety specialists. Granted that most of their career are thankfully spent on passenger comfort, but that’s a nice bonus to their presence to save your life in an emergency.