What did David Grusch mean in his interview with Joe Rogan about talking more about Elon?

We know that Elon says he is confident that UFOs don't exist. Grusch mentioned that he has the clearance to know, unlike Elon, and that he can talk more about Elon if Joe wants. Since Joe loves Elon, he didn't want Grusch to talk about it more, so he didn't bring it up. But what further thing do you think Grusch would say about Elon if given the opportunity?