Nine hot dogs and nine beers across nine innings of a baseball game, one of each per inning, finished before the final out. Doable on paper, catastrophic around the sixth inning, and now harder thanks to the pitch clock. Watchable versions put the loser at a real ballpark with the league in adjacent seats.
Heavy sentence
Severity 4 punishments are the ones people talk about for years, which is exactly why they need full league buy-in before week one. Put it in the constitution, set the deadline, and agree on proof requirements up front.