A little while ago my wife and I watched the movie "Run Fat Boy Run". I thought the movie was okay, but one particular part made me cry because I was laughing so hard.
It's the part where he hits the wall during the marathon. If you have never run a marathon before, this is a perfect (and very funny) illustration of what it feels like to hit the wall. For those of you who have run a marathon, is this not exactly what you feel like around mile 21?