A 33-year-old guy in England says he developed 'shingles' because of a prank his buddies played on him at his bachelor party. Shingles is basically like a re-occurrence of chickenpox, and it can be brought on by stress.
The guy was driving with his 30-year-old fiancé when 16 of his friends pulled up, stormed out wearing ski masks, set off smoke grenades, kidnapped him, tied him up, threw him in the back of a van, and drove for two hours.
After 100 miles or so, they let him in on the joke. But he still had to ride a bike for 10 miles to get to the bachelor party . . . wearing only a green 'mankini' bathing suit like the one in "Borat". His girlfriend was in on the whole thing, and they still got married.