In my case, the one great example I can think of this wasn't exactly well-written so much as quickly written. At the last Lancaster County Linux Users Group meeting I was at, somebody wanted to run two tethereal processes at once, and have one output in green and the other in red. (For incomming and outgoing packets on a firewall.) A professional programmer across the table from me started to say how hard it would be. I just said "I can do that in one line of perl" -- and then proceded to do it, with help from a manpage (to get the escape code), and a peice of paper.