Form groups of 6-12 people
Have players create events and write them down on small sheets of paper. Be sure that they don't share these ideas aloud with anyone
Creativity is a MUST for this game :)
Here are some examples of events:

Being attacked by a shark while you're fishing
Hitting a home run that wins the World Series
Winning the lottery
Going on a first date

After everyone is done writing, collect all of the papers and put them in a hat.
Whithin each group, choose 3-4 people to act for each round.
Players will randomly draw from the hat