Board Thread:Questions and Answers/@comment-1038387-20120921185155/@comment-4928331-20130314042726

I'm in the camp where once you fire off a spell, it's fired. Killing the caster afterwards won't help.

But obviously neither of us can convince the other, and we're not going to get a resolution based on canon. Therefore, we'll just have to agree to disagree on this one.

If he didn't slam GB into the blasts, I'm sure the Team would have a contingency. Maybe they'll use Wally, have Superboy be on the mission to take the hit, or whatever. They're just lucky GB didn't density-shift once he was dragged along for the ride.