I am a very nervous flyer. 

During a trip from California to Indiana, it didn't help that my connecting flight from Denver was delayed twice because of mechanical problems. 

Then, after we were aloft, I noticed the lights began flickering.

I mentioned this to a flight attendant. 

"I'll take care of it," she said.  Moments later the lights went out.  Clearly she had solved the problem by turning off all the lights.

A passenger across the aisle who had been watching me leaned over and said,

"Whatever you do, please don't ask about the engines."