I know that "irrational fears" (they're anything but irrational, but let's not get into that), are no laughing matter for those who experience them, but this one made me chuckle:
Angrophobia - Fear of becoming angry
Can you imagine? I mean to say, getting angry is one of the most obvious and, dare I say, natural (clearly I do dare say), reactions to stimuli. I would argue that it's one of the first reactions that most people make resort to. But, somewhere along the way, someone (society in general, I think, which seems to view anger as indicative of something aberrant), has installed a trigger that leads one to be fearful of venting one's feelings in an overtly angry way...
Jesus! How fucked up!