Hmm, good question. It depends on what level humiliated. Is it that only me felt humiliated inside and no-one else realized it or humiliated in front of everyone? What if I happen to humiliate myself from time to time by social accidents? To tell you the truth, I don't remember the LAST time I was humiliated, I only remember the major ones. So you either be more specific in your question or I skip an answer.
When was the last time you shat your pants?