I expect Wally to be imune to the fist of death in some way.
Most people that get fisted by Allice are quite unaware of it and provoke it unwillingly.
Wally knows about it and Wally also always exactly knows what he's doing.
Angry Birds would do well to add an "Alice" bird to its arsenal; the inevitable fist-o-death in the third frame is known to kill everything in its path.