The "petition" referenced in the news coverage (linked above, top) refers to a Change.org petition, not a legal action. Yet. The case would be useful to consider tort claims, such as the infliction of emotional distress, as well as defenses, such as consent and assumption of risk, vitiation on public policy grounds, and the American ethos of personal responsibility.
Thanks to my TA, here's an even better item, funny without the dark angle, bringing a lawyer into the picture: the first two segments of Nathan For You s1e05.
Happy Hallows' Eve.