Spike-X
Grumpy Old Sarah
I don't think the Scarecrow's gas had anything to do with it. I think he was a fucked unit long before that.Didn't the joker come into being after the noxious gas outbreak in the psycho ward in Batman Begins? you heard all the loonies running around losing the plot, and then that Joker card popped up at the end.
The scene with the card is straight out of Frank Miller and David Mazzuchelli's Batman: Year One, as is a lot of other stuff in Batman Begins (the scene with the bats, for instance).