Wow! Getting a lot of attention and a lot of great suggestions in comments! Will add in a list of all champions and include my favorites from comments as soon as I get time (it's coming, don't worry). Also, if I don't include yours or don't include your name (I probably won't include names, because I have seen rather similar ones, and I'll probably be blending a lot of them together anyways), please don't feel sad. I saw your comment, and I probably liked it, it's just I felt that someone else's was more creative or fit the spot better. Thanks!
(that was long)
Ok. I can't remember where I saw this concept before, but I feel it's worth bringing up.
What if champions got a unique global quote activated upon receiving a pentakill?
If you think about it, I can see absolutely no reason why this is a bad idea. It makes the pentakill experience even more fun, while not interfering with gameplay.
Essentially, it would be like this. Champion A has got a quadra kill! Champion A has got a penta kill! *Champion A speaks a quote that is heard by all players*
Some example quotes would be:
Nasus: "Rest in peace" (an homage to his voice actor)
Sona: Plays a part of "We are the Champions," or other appropriate song (IN ELECTRIC GUITAR)
Gangplank: Reference to the "You will remember this day as the day you almost caught Captain Jack Sparrow" line from Pirates of the Caribbean, albeit appropriate for a situation where you have killed everyone on the enemy team.
Xin Zhao: "Somehow I'll make a man out of you" (in appropriate condescending, Li Shang voice)
Pantheon: "THIS IS SPARTA"
Darius: Basketball end game buzzer.
Soraka: I weep for the fallen.
Viktor: You could use an upgrade.
Diana: The blind are silenced.
Lissandra: Frozen in an avalanche.
Ok, as you may have guessed, this is an obvious excuse to put awesome movie lines into League. However, I still think it'd be cool to get a pentakill with Pantheon and hear him say, "THIS IS SPARTA!" Thoughts? Suggestions?
EDITED TO INCLUDE QUOTES FROM COMMENTS