We play the game you call Viking,  but we call it "Moose".  We wiggle our
fingers like moose antlers instead of Viking horns, and the people directly
to the left and right of the moose make one wiggly antler of their own on
the side of their head closest to the moose.  One other difference --
everyone in the circle is slapping out a rhythm on their laps throughout
the whole round.  Having to switch from keeping the beat to making antlers
and back again  adds greatly to the difficulty.  Also, in Moose it is legal
for anyone in the circle to try and trick someone into becoming the moose
by clapping their hands at them.

Shelley