1) Affected folks 2) Baffling puzzles 3) Baffling questions 4) Brainteasers 5) Conundrums 6) Difficult questions 7) Enigmas 8) Modeling pros 9) Models or puzzles 10) Models or tough questions 11) Nuts to crack 12) Photographic subjects, often 13) Puzzles 14) They get shot 15) Tough nuts 16) Tough ones 1) Enigmas 2) Models