You were in Mexico on a drug run during your wild and crazier days, when you decided to head over to the las playas for a little R and R. While taking a little swim, you paddled right into a school of Portuguese Man O' War. Even though you were able to muster the strength to make it back to shore, you had a heart attack right there on the beach.
If it wasn't for the kindest of an elderly doctor named Paco cracking your chest with fruit knife, and manually massaging your heart till help came, you wouldnt've of made it. Even though you made it back to the States, you've still got this gnarly scar to remind you of those wild and crazy times.
And to pay back Paco, you now sponsor a few wayward indigenous Mexican kids schooling*.
* Get yourself a nice wallet size portrait of a kid with wild hair and a little dirt on her cheeks to flesh it out. It could totally work.