The way this works is someone says something fortunate that happened, and the next person says something unfortunate, as you normally do.
Examples:
Poster 1: Fortunately, the man didn't have aids.
Poster 2: Unfortunately, he had autism.
Poster 3: Fortunately, he wasn't dyslexic.
Poster 4: Unfortunately, he was bullied for having autism.
Go! (nothing bad with autism/dyslexic, just examples)