Given scene/plot descriptions from movies or TV shows, and given a specific question about the scene, summarize the question into a title

[Q]: I have only watched a few episodes of Being Human (the original BBC series) so I may have missed something. (Just got hold of the dvds so trying to catch up.) In episode 3, George transforms into a werewolf after/during fighting Tully in the shed. He exhales a green mist just after the transformation has finished. I didn't notice this in any other episode, did it have something to do with fighting Tully? Eg, proximity of another werewolf? Any other explanation - maybe just werewolves have very bad breath?
[A]: Why does the werewolf exhale a green mist?

[Q]: In Wes Craven's New Nightmare, when Heather meets Wes at New Line, they talk about making a new movie to make Freddy stop. At the end of this sequence, we can see that Wes is actually writing the script of "New nightmare". The dialog shown on the screen is literally what has just been said: (1:04:50) This sequence ends with a fade to black, as written on the script. I'm a bit confused about this part of the movie. At this point, is Wes both inside the movie, and writing the movie?
[A]: Is the script Wes Craven is writing on his computer the movie itself?

[Q]: What was the reason behind the conversion of human into USB in the movie Lucy? Why did the heroine change herself into USB when she used 100% of her mind, and then texted the policeman ("I am everywhere")? She traverses many old eras, and in the end just forms a strange structure, giving the researcher (scientist) USB and then that huge structure falls off?
[A]:
Why did Lucy convert herself into a USB?