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He was supposed to interpret the day's speeches into sign language.
Instead, Thamsanqa Jantjie basically flailed his arms.
Observers say Jantjie, hired to interpret at the ceremony honoring Nelson Mandela, gesticulated without any discernible meaning and didn't even know the signs for "thank you" and "Mandela.
But, something he admitted in an interview with CNN's David McKenzie is less easily laughed off: he's a schizophrenic that had been institutionalized at length and has had violent episodes.
So how did someone with serious, potentially volatile mental health issues wind up standing inches away from world leaders?