Posted by Peter persoff on May 07, 2003
In Reply to: "Heads up" posted by ESC on May 07, 2003
At sandlot baseball games spectators may be
near the foul lines, and not always paying attention to what is
happening on the field. Then if a batter hits a pop foul, someone
will yell, "heads up!" to get everyone's attention
so no-one will get beaned by it.
It has to be something short that everyone will understand immediately.