Teemo Auto Attack delayed damage.
Made a post earlier, no one believed me, but now I can confirm it. Teemo's auto attack is broken, the damage happens about .40 seconds after the impact... this makes last hitting friggen ridiculous, as he's not an AD champ to begin with, so last hitting is hard enough. Easily repeatable, steps below.
Step 1.) Pick Teemo
Step 2.) Attack things