“Don't show it and don't panic. Do like the ducks; on the surface stay calm, and below it paddle lile hell”
“Be a duck, remain calm on the surface and paddle like hell underneath.”
“Be like a duck. Calm on the surface, but paddling like the dickens underneath.”
“Always behave like a duck- keep calm and unruffled on the surface, but paddle like the devil underneath.”
“Keep looking below surface appearances. Don't shrink from doing so just because you might not like what you find.”
“We don't shout 'Don't panic !'towards anyone who's in panic.”