Limits

Math joke from Anna, the civil engineering student and bartender at Brackins Blues Club: an infinite number of mathematicians walk into a bar. The first one tells the bartender he wants a beer. The second one says he wants half a beer. The third one says he wants a fourth of a beer. The bartender puts two beers on the bar and says "You guys need to learn your limits."

From here.

My kind of joke... haha. If you don't understand it you're obviously not an engineering student... >:D