OurigamiRoubout está correto Eu gostaria de adicionar mais alguns detalhes.
A cena:
Isso foi especificamente adicionado no "último minuto" para explicar a tosse nos filmes porque o Clone Wars Grievous não teve tosse nos episódios anteriores. Como dito no comentário em áudio no DVD do Volume II (minha melhor tentativa de transcrição):
Genndy Tartakovsky:
We're in this time crunch (...) and he says that George says that
Grievous has a cough and can you guys maybe put it in and explain how
he got the cough, because ours obviously does not have the cough (voice
was not yet decided) and I go Howard.. we have a week left or a month
left before we deliver. So this sequence right here was all after that.
We kinda got together, we talked about it and I go.. OK let's have
Mace crush his chest and that's how we'll introduce the cough. (...)