This is a technique used to get compliance from others to get them to behave in a way you want in which a large request is made knowing it will probably be refused so that the person will agree to a much smaller request.
Door in the face technique definition.
The door in the face ditf technique is a compliance method commonly studied in social psychology.
The respondent is then more likely to agree to a second more reasonable request than if that same request is made in isolation.
Psychology definition of door in the face technique.
The real objective is to get the person to agree to the small request which is made to seem very reasonable because it is compared to such a large seemingly unreasonable request.