title: What is call/cc?
body: <p>I've tried several times to grasp the concept of <a href="http://en.wikipedia.org/wiki/Continuation" rel="noreferrer">continuations</a> and <a href="http://en.wikipedia.org/wiki/Call-with-current-continuation" rel="noreferrer">call/cc</a>. Every single attempt was a failure. Can somebody please explain me these concepts, ideally with more realistic examples than these on Wikipedia or in other SO posts.</p>
  
  <p>I have background in web programming and OOP. I also understand 6502 assembly and had a minor randez-vous with Erlang. However still, I can't wrap my head around call/cc.</p>