[So long as John keeps hold like that, and if no big conversation comes up along the way, it should only be so long before they get to the grocery store. Granted, it certainly takes longer than if they were their normal sizes, but Karkat mitigates that by taking the most direct route he can.]

[So. Doors. Karkat sits down a space away from the entrance.]

Fly your graceless mammalian behind up there and make the motion sensor work. The only other option is me jumping around like an idiot and hoping I leap high enough to catch its metaphorical attention, and we are not going this route when I already carried you across town. You owe me, by the way.