[He's a little worried about that giant butterfly! But it hasn't attacked him yet, so Goku assumes they've got a truce going on. Even if it does make him nervous.]
Ah, yeah!
[Sakura is ridiculously adorable and looks like she just stepped out of a shoujo manga with her butterfly friends, so Goku can't help smiling at her despite everything. He crouches down so he's closer to her eye level (not that he was that far from it standing up).]