At the beginning of his speech, what bit of humor jason reynolds charm his audience

Jason Reynolds charmed his audience at the start of his speech at Lesley University Commencement address by making a joke about his hair and the fitting of the head ornament he was using. The central idea of his joke is to validate one of his principles: Insecurities are Healhty.

"Sometimes insecurities and fears can push us towards greatness: to do more and to be more." (Reynolds)

So, the final answer for this question is:

by making a joke about his hair and the fitting of the head ornament he was using.

i got you covered.. i will do my best