Nikki Shelley is a self-taught face painter who lives in Rugby, England, and her Halloween face paintings are like tiny horror movies that live on your face. On her Facebook page, she says of her work:

As a mum of 3 young children, I started face painting many years ago as a way of entertaining them through school holidays etc. I soon developed a love for the work and branched out to my friends and family's events.

...which sounds pretty benign, considering that a lot of her work would make children cry, and not in that "I've had too much fun and now I'm just tired" way. 

Sources: h/t Mashable