Nikki is a naughty adult schoolgirl dressed in school uniform including tights (pantyhose). She doesn't study hard and is like to fail her Sats.

She is given a chance to try some mock Sats and if she passes she will receive a gold star, but if she fails, she will receive something worse than detention.

The scene contains 3 sats and therefore Nikki can be gunged up to 3 times in the tank, if she fails them all, losing clothes with each gunging. As her brain is truly scrambled, we think it is likely that Nikki will lose lots of clothes and get very messy indeed.