Just crazy enough to work

Pool party skins + 's ult. Every time ults, anyone with a pool party skin is affected (visual only, ofc).

Everyone, with a pool party skin, begins riding a surfboard, when she ults. Allies ride the wave on the surfboard, while in the wave. Enemies get knocked over in some hilarious, falling off surfboard, animation.

Now, imagine pool party (with ult), riding the wave while trying to catch some other surfboarding champ, until they get knocked off the surfboard by the wave.