I hate it when you know everything you want to say, but you just can't get the words out right.... and like- a few days later, after everything is said and done, you FINALLY get the right words to say to make your point most clear.
It's like- COME ON, BRAIN, couldn't you have figured out how to say that SOONER!?
This is also an issue with good comebacks.
They never come when you want them to, and when they DO finally come, you hold on to them like Gollum and the Ring hoping that one day that topic will be brought up again, and you will have your few seconds of awesomeness...... but it never does, and you forget it anyway...