First thing I say to a new low-houred pilot when we fly together for the first time ' don't EVER under-estimate my ability to foul up' or words to that effect. Perhaps a bit melodramatic but it seems to make them realise that four stripes, god knows how many hours and thirty years in the business does not give a cast-iron guarantee that things cannot go wrong in the lhs.
Works for me - may not work for others !