Here are some of the examples of positive psychology:
When you fall down the stairs and think, “wow I fell down very fast. Maybe that's a record!”.
When you hit rock bottom in your life and think “ wait! I can't fall anymore. The only way from here is upwards. Come on!! Let's do this!!”
When somebody asks you “are you suffering from mental illness?” And you reply “no. I enjoy it.”
When you buy a second hand car and your friends ask you “why have you bought such an old, rusty vehicle??” And you reply “ I just got myself a very well experienced car at a very cheap price.”
When you fail an exam and you are like “ I get one more year dude. That's a lot of time to master the subject and maybe I can be better than the guys who passed in just one year.”When you are fired from a job and you think “ Yeah!! I am on fire! Bring it on!”
Source: Quora