Shocktato is a party game from the same people who made Lightning Reaction Reloaded, which is my all-time favorite party game to play with people who are slower than I am. As you've probably guessed, their new combination of good times and good Zap!s is a take on the classic Hot Potato.
One that requires players to put a little more, uh, skin in the game.
To play a standard round of Shocktato, grab one or more friends, press the Start button, and begin passing the Idaho-sized russet back and forth or 'round and 'round as it plays festive music. Festive...and telling. If you're the poor SOB stuck with the Shocktato when the music stops, BZZZZZ! Enjoy a few volts of electricity. Maybe it will wake you up. Teach you not to be on the losing end of the tuber next time.
Shocktato also has an Extreme mode, which eliminates the music, and so gives no hint as to when the shock is coming. As a fun prank, Lightning Reaction suggests switching to Extreme mode, hitting Start, and just handing the Shocktato to someone to "check out." Again, that's Lightning Reaction's suggestion. Not mine. Not at all.
If you've got kiddos or lame-os playing Shocktato with you, there's also a Lame mode to the game that plays the music with no shock at the end.