While trying out Vayne, I noticed that I was dying. [A lot](http://4.bp.blogspot.com/_D_Z-D2tzi14/S8TRIo4br3I/AAAAAAAACv4/Zh7_GcMlRKo/s400/ALOT.png). Far more than my lack of skill would normally merit. It seems like after I tumbled, I stopped attacking. I could have also been clicking elsewhere in the mayhem. Does Vayne's Tumble cause her to lose her target?