Whenever You Get A Kill With A Summoner Icon Finisher In Urf
http://karlmac.com/wp-content/uploads/2011/11/Nuy6D.gif
Any champion with a knock-up while getting the kill makes the heart or orbital look just downright amazing.
(Or just the world's most epic Sion crotch kick causing them to explode into a heart.)
four of them were ganking karthus at low hp just as he began charging his ultimate. they died at his feet. so many hearts. so much love.