Even though the fad has passed, this can still be a fun game that Korean students get kind of excited about. First, write up some questions. I use review things mostly but add in a few random ones like, "What time did you wake up this morning?" or "How long did it take you to come to school this morning?"
Then, in class count up your students and make up a "draw." You know, the round of 16, quarter-finals, semis and the final. If you have an odd number and it doesn't quite work, make up some "last-chance spots." So all the people who lost their game in the section of the draw can compete against each other for the last spot. Write up student's names in the draw, randomly (I use the attendance list). To add some more fun, and for smaller classes you can get students to pick a country. For bigger classes, wait until the semi-finals before you allow country picking.
Anyway, ask the students a question from your list and the person to answer the fastest gets to move onto the next round. That's it!