I remember the day before the stock tanked. The volume vs. open interest on way OTM puts was absurd. Traders made several thousand percentages on their positions.

Edit: picked up some historical data. 40k volume on front month 25 puts for .275 a contract. Finished next day at 4.25, and the day after (Monday) at 20.30. This one gives you about a 7400% gain.