[This man's chaotic---a whirlwind. Going on and on about the intricacies of space-time like it's as typical as the weather. Is this how the alternate Emmett Brown comes across to others?]

There's a boy from my town here, Martin McFly. He's not behaving as the model citizen I know he is, and he seems to believe that I'm meant to be blathering on about timelines and inventing strange objects...in other words, someone like you.

This would happen because our 'timelines' diverged at some point or another?

[He sounds uncertain, so far out of his element.]