Unless you just happen to be close to their Nexus as soon as you win and can get close enough to their camera... which isn't so likely in Dominion.
I never thought of this, I always loved to dance and laugh at the Victory screen, I guess the most we can do now, is to try and be in the lane next to the Nexus when it explodes.
It's way more fun to watch Garen spin forever in front of your humiliated enemies.
I didn't even realize that in dominion there will be a nexus.
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