Possible Clues:

• Awkward-looking picnic contest
• Remove people in sports day event
• Jumping contest
• Company picnic event
• Contest in which every competitor's bagged first
• Fire unlimited ammunition, you see -- that'll get 'em jumping!
• Event that sees career on fire?
• Old wine people in a childish game where the loser is left holding the bag perhaps
• Event that sees people on fire?
• Competition one may have in the bag