Bean boozled

When my grandma was in town I wanted to take her and my parents to Sweeties, one of my new favorite stores.  JJ's favorite candy and thing to do with guests is play Bean Boozled.  Have you every played it?  It's jelly beans that look the same but have one good and one nasty flavor.  Similar to the Harry Potter jelly beans.  My family was in a rush to get going, but we did get to squeeze in (force them to play) a few rounds.