Well, unlike most of the guys on this forum, some of us have had academic/athletic/social Big Man on Campus Syndrome.
When we are first hit with the boos instead of the cheers, it doesn't go down too well. Some have thicker skin than others. Vince is used to beating himself up to achieve. He is now in a situation where the customers are beating him up, and he needs more reminders on how to deal with it.