Basically in this game you do what the title suggests and list a good idea for the next poster to turn into a bad idea. Then you've turned it into a bad idea list a good idea for the next poster to use. For example do something like this,
Poster #1 Good Idea: Throwing a Penny into a well to make a wish
Poster #2 Bad Idea: Throwing your sister Penny into a well to make a wish
Good Idea: Climbing a Mountain
Poster #1 Good Idea: Throwing a Penny into a well to make a wish
Poster #2 Bad Idea: Throwing your sister Penny into a well to make a wish
Good Idea: Climbing a Mountain