It was just meant to be a normal visit to the bathroom.
But a 38-year-old man in Thailand ended up being involved in a horrific fight with a snake when it came up through the plumbing of the toilet and bit his penis.
This video shows the 9ft-long python in the bathroom, and the aftermath of the fight with the reptile.
The battle actually went on for half an hour and doctors in Thailand have said the man's wound needed stitches.
But they also said he should make a full recovery. Phew.