I think Hillary was just trying to be comical about how close the mikes were to her face:
I don't know how I'd feel if she really had a seizure. It would help her avoid justice for all her crimes by letting her play to the sympathy factor (but then I don't think she'll ever face real justice while she's alive) and a real seizure would give the Democrats an excuse to nominate someone without all her negative baggage and to ignore all the bad work she and Obama have done.