Oasis disk motion!
One user in other Laundry forum says:
"The rollover is caused by the impeller moving back and forth, in quick movements and makes a swishing action much like a agitator IMO. But, adding to that action is the drum, which ever so gently moves as well. Hmmm... I will post a definite direction later as I think it's a side to side action. The impeller seems to do most of the work. Clothing does not stay in one heap. I wouldn't say you can actually see the clothing come way up the sides or middle, it's more of a gradual process. If I'm not mistaken, I don't see water shoot up from the impeller to assist in the movement of the clothing. The cloths cover the impeller for the most part until the spin.( I did do a small load as well)
I shine a flashlight through the window during the cycle to give you all the play by play! Yes, for the whole cycle! I do like the technology. So very different from the FL's though."
This saying seems that the clothing is neither "normal rollover" nor "reverse rollover". The clothing sits on the disk and follows the forward rotation and reverse rotation of the disk.