Just found out that Vayne's tumble if in movement lets her get out of range of LeBlancs full combo if W-Q-R-E combo but not the Q-R short combo.
Sadly, I was in a team against LB, Blitz, Malz, Jax, and another Vayne. All those CC made it pretty hard. Not to mention the leaver.
Damn that dumb Shaco that raged after dying only twice. We were winning too.