by GeekJock
James is correct.An easy way to remember the difference in where cards go is to put the "played" cards out infront of you where they stay until the turn is officially over.
Basically anything you PLAY cannot be used again this turn unless it is triggered off of another effect like clayface. None of the other cards can bring it back into your hand.
Basically with enough draw and grab you can essentially run out of cards to use if you have thinned out your deck enough (a very common thing for well thinned decks in Ascension).
So the Kid Flash and Bat Signal are one and dones in that case.