Master Yi and Fear
Okay, so...I don't THINK this is intentional, but with the way that fear works now, whenever Master Yi is under the effect of Highlander if he is affected by a fear ability he shoots in the opposite direction (because he can be affected by Terrify, but not the slow that accompanies it). I dunno if Riot wants to high light this as a feature for Nocturne, Fiddle and (soon) Warwick to have against Yi, but it seems like such a random case of the ability just not working like it's supposed to on every other champion that I thought I'd go ahead and report it as a bug.
Map: All Recreation Rate: 100% Recreate: Play as Yi. Activate Highlander and have Fiddlesticks Terrify you/Nocturne Unspeakable Horrors you.