uedori: disappearing throw?

I'm sure I've seen this done, but can't recall it.

Anyone got a simple definition for this? It's driving me nuts and class isn't until tuesday. Patience is not one of my virtues.

Any help would be appreciated!

PS: This is refering to an AAA 1st kyu test requirement - yokomenuchi sudori.

Domo!

I believe that you duck and uke's momentum carries them over you into a roll.