Once on upon a time on the way to Flight Safety...
My co-worker and I were in a CRJ bound for ICT. I awoke from my nap early in the cruise to find my buddy with the disgusted expression he gets when the airplane breaks. "How bad do you want to get to Wichita?" he asked, and sternly pointed out the window.
The fuel cap on the left wing was streaming fuel in a big time way. He debated for a while, then called the FA. She went and told the CA, who eventually came back. We were trying to be discrete, as everyone else was clueless.
By the time he got there, it had quit of course. With no evidence, we felt kind of dumb, but it was a sight to see for a few minuites. What could we say..."Were ATPs.....really..we are!!!"