Lee Sin/Zoe Bug

Someone linked this video in C9 Sneaky's stream. I didn't see it on these forums, so I figured I would post it here.

In the video Lee Sin jumps to Krugs. Enemy Zoe doesn't know where he went and throws bubble to bottom lane. Bubble lands and then disappears from bottom lane. Lee Sin goes Drowzy and falls asleep at Krugs, is killed by Krugs, and Zoe kill credit.