Clear examples of when mind games affected a fighters performance?

We talk a lot about fighters getting into their opponents heads. Sometimes i think we can look too much into it. How many times have people said a certain fighter looks "shook" and then they go in and win. What are good some examples where a fighter was pretty much defeated or angered out of the ring and went in fighting in a different manner to what they usually do? i.e going in and just throwing bombs out of anger..