con·tor·tion·ist /kənˈtɔrʃ(ə)nɪst/
  軟體舞師
  Con·tor·tion·ist n. One who makes or practices contortions; especially, a gymnast who is able to twist the limbs into positions impossible for normal people to achieve.
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  contortionist
       n : an acrobat able to twist into unusual positions