I noticed this the second time I ulted succesfully. :D
ALSO:
Darius' R fears both allied and enemy minions
Garen could mark enemies as VIllains for killing him -- this is no longer the case as of this patch
Zed's R creates a spinning shuriken above the enemy's head when the detonation will be enough to kill the target (I learned this pretty recently, was it always a thing!?)
Vlad's W practically moves him under the surface of terrain for the duration