My favorite is running into a bush at about half health as amumu, people think they can just chase me, I run out the way I came in right as they follow me in, then I unleash hell on then after I've stalled long enough for allies to arrive.

Though the best juke I ever pulled was running through both of the junlges in TT in their entirety with 2 bars of health as panth with all 3 following me. I literally stalled long enough for my freshly dead teammates to respawn, I baited them into them, then managed to get a double kill and escape with 1 bar. They were sooooooooo pissed at me.