"I thought we should talk. Shockwave to Shockwave."

Mostly he wants to know if this larger version of himself is a possible ally or threat. And as he says it, he plays a slight trick, and slowly raises himself up, letting his legs bring him closer to a height where they could speak optic-to-optic.

It is also a not-so-subtle hint he's sending that he isn't to be underestimated, as well as a show of his capabilities. Image is important. And perhaps if he gives a little information, he'll get some in return. Why do anything for just one reason?