Replying to Helping others with mental blocks

ITT I'm not asking for help on how to overcome my own mental blocks—I want to know what experience you have with helping others to do so, especially those newer to freestyle skiing.
For example: trying to get someone to attempt a backflip when they are capable. Are you supportive? Do you get them riled up? Do you approach it with them logically? Maybe just call them a pussy?
What do you say to someone to help them overcome their own mental blocks?