Roles are Reversed

My next piece of fanart for CL: Evolution.

I noticed that in a lot of CL episodes, Yumi has always been the one to fall over the edge of Lyoko and fall possibly into the digital sea. I watched the teaser for Evolution and saw Ulrich was in that position... IDEA!!

I know William saves Ulrich, but I feel like this would somehow happen, if Yumi were to save him instead.

But, one other thing... I never figured out why they always hung on with one arm. I mean, what's wrong with the other one? You could hang on longer if, at least, you switched arms from time to time. I don't get it, Moonscoop...