security guard making his hourly rounds at the Smith Federal Building
in Washington, D.C., noticed light coming from the building's
back door. He looked inside and saw a wooden box with a note taped
to the outside: "do not come any Closer. This box WILL EXPLODE."
Near the box, the guard noticed a large black flashlight. Realizing
the potential danger of the situation, he carefully retraced his
steps and called for assistance.