One of my favorite things about PandoMonthly is surfacing the relationships between our guests, and discovering what well known entrepreneurs and investors have learned from one another.

Part of the magic of Silicon Valley — and increasingly New York, LA, and other places — is the cross-training and mentorship that goes on. The moment when you realize that everyone — even world famous billionaires — have those moments when everything is cratering and they are staring in the abyss and chewing broken glass.

Calacanis isn’t the most successful entrepreneur we’ve ever had on stage at PandoMonthly, but he’s friends with two industry legends: Mark Cuban and Elon Musk. I asked him last night what he’d learned from them.

(BTW: Only one person mentioned in this post hasn’t done a PandoMonthly yet. Cuban: I will come to you and do a special one-time Dallas event if you are game. If you live in Dallas and want to see this happen, well, you know Cuban’s Twitter handle…)