[Vanellope huffs and folds her arms again, watching him through squinted eyes. He is fast, and it's obvious he's not going to just let her leave.]

As sure as yer face is ugly I am. I wouldn't even be out here if I didn't know I could get away if I needed to.

[Then she raises a brow, glancing back at the little pile of shells a few yards away.]

Prove it? ...You want me to race you?