according to eyewitnesses , and confirmed by news cams , the offending water balloon was thrown by shank , who used her press pass to get within water balloon range of the prime minister , who was leaving the russian art exhibit at the metropolitan museum of art on 5th ave. a scuffle with ptard 's security detail ensued , and shank and her accomplice and camera man , seamus 'biggy ' murphy , 21 , were apprehended and arrested by nypd officers at the scene .