In 1980 Alberca et al. described a patient with a syndrome of increased muscle irritability, who presented ondulating muscle rolling movements and electrically silent cramps, myoedema and muscle reactions to mechanical stimulation similar to myotonic response, suggesting a disfunction at myofibrillar level.
For c-3po, it was a costume, Anthony Daniels played c-3po: For R2-D2, It was a costume and a remote controlled robot. CGI was also used in the prequel trilogy. So, they had Kenny Baker to play him : And from Portrayal section of wookieepedia article on R2-D2 :
In Iron Man 3, Robert Downey Jr. reprises his role as Tony Stark (aka Iron Man), and Gwyneth Paltrow reprises hers as his girlfriend, Pepper Potts.The third time might be the charm for some things, but the number three after a movie title is typically shorthand for a deal with the devil.ut Robert Downey Jr.'s billionaire industrialist Tony Stark doesn't spend much time in that computer-generated Iron Man suit, which means fewer cut-ins of Downey's little head inside it, reacting to battles that we know â no matter how much we want to believe â have no actual human component whatsoever.