I think it is when the objective was to knock your opponent into the water, and your ability is simply that you are unable to be knocked over. You've practically nullified any chance of the opponent winning by default.

[He folds his arms over his chest as he eyes their food coming up, really craving that sugar he can see getting dusted over the churro. He notes to himself to let Ayaka drag him everywhere for food in the future.]

It's quite alright though. I still found a way around it to win.