'Don't give up your day job!' It's the great leveller.
In many business cultures and families the put-down is an accepted part of conversation and humour - after all, nobody wants anyone to become a big-head. For some people it's an instant response, as if they can't bear the thought that someone else might be successful at something.
'What doesn't break you makes you stronger.' There's some scientific evidence to support it.
Researchers at the University of Michigan studied the way students reacted to the attacks on the World Trade Centre in 2001 and found that amongst those who were not overwhelmed were some who thrived and became more resilient.