Anime tank girl!

Wut

The way this anime girl is sitting, it looks like she has no pants! In reality, she's just obscuring her short skirt with her knees!

But the foot though

Pointed straight in the air

Is she standing on someone else?

Could she be standing on the shoulders of the tank driver? I don't think so. I think she's sitting on her own legs.

But... the foot?

Where does the foot come from?

Her right hand touches the foot.

She's sitting cross legged and she's very flexible since she used to be a gymnast?