How to make a great first impression on someone much smarter than yourself?

[Beck]

Super cute guy, I'm actually pretty I guess, but that doesn't matter to him probably. He's way nerdy and smart and we are going rock climbing on Saturday. But just by talking to him I can tell he is very intelligent. He's in tons of AP classes (he's a senior in high school) I graduated high school early. And I just don't want to look stupid. I'm great at being myself BUT do you guys have any tips?
my twitter is @beckshniddley if you want to see what i look like.

[Thomas]

*checks twitter*

Well, I hope he's into goth chicks. Just be yourself. That's all you can do.

[Mark]

Well, unless you're at a math contest (or something similar - perhaps a philosophy debate), the trick to making a good impression on someone (anyone, really) is to LISTEN when they speak, as opposed to thinking of what incredibly witty thing you're going to say as soon as they stop talking.