Your life is cut short by an unforeseeable freak accident, but the Grim Reaper offers you a second chance at life if you can beat him at any competition/game/sport etc. of your choosing. What do you pick and why?
It must be a legitimate confrontation where both parties are on equal footing save for personal skill, so no "who's the best at being me" or "what number am I thinking of?"
The Grim Reaper can absolutely trounce the average practitioner of whatever you pick and wipe the floor with a first-timer so if you think yourself better than 50% of the population at whatever you choose, you have a chance.
If you currently have an injury/condition or any other impediment you are temporarily rid of it but you must participate with your current level of physical fitness/preparedness or the level of those qualities you had on an average day when you were practising it.