“The first rule of holes: When you're in one stop digging.”
“Healey’s First Law Of Holes: When in one, stop digging.”
“When you find yourself in a hole, the first thing to do is stop digging.”
“Remember what to do when you're at the bottom of a hole? You've got to stop digging.”
“When you are in a hole, stop digging!”
“When you find youself in a hole - stop digging.”