I just found this thread and couldn't resist after reading the jokes. I heard this the other day and thought it was funny.

Walking to work the other day I passed the mental health hospital. The kids were playing in the yard and I heard them all saying 13, 13, 13, 13. I couldnt resist knowing what was going on so I peeked through a hole in the fence and OW!!!! One of those brats poked me in the eye with a stick. I reeled back and started to massage my eye and thats when I heard them saying 14, 14, 14, 14.