There is a story behind this ...

... But I'm not sure I want to know it. It's probably either ridiculously banal or so screamingly surreal I couldn't put it in a work of fiction and preserve plausibility.

Either way, this is one for the Darwin Awards:

Am J Gastroenterol. 1993 Jan;88(1):122-6.

Fulminant acute colitis following a self-administered hydrofluoric acid enema.

Cappell MS, Simon T.

Department of Medicine, UMDNJ-Robert Wood Johnson (Rutgers) Medical School, New Brunswick.

A 33-yr-old white male presented with bloody...