Jo and the Bush

"Prove it. Tell me about the thing I've only told a handful of people, and tell me why I told the people I did."

I have a password that I can use to prove it.

"How can I know you're me from the future?"

"Think about it. Why'd I go back in time and tell a completely unrelated guy I'm him from the future?"

"...Good point. Alright me, you can go back to explaining how to thwart the Robot Facebook Apocalypse."