wait what how did i possibly get that kill all planned
I once killed someone as
because I threw a Q BLINDLY into the enemy red buff, turns out the enemy JG
was kiting the Red buff so it hit him. He had about 20 hp and flashed away. I did his Red since it was about a quarter health and Q'd to the Krugs. Turns out Yi was hiding over there and the Krugs smacked him and I got the kill.
i know that feeling bro! 
i'm a simple man. I see Psych and i upvote.
https://tribzap2it.files.wordpress.com/2014/01/psych-remake-episode-gif-five.gif?w=480&h=360
Or when you play Karthus, pressed ult for your lane opponent, accidently end up getting a triple kill
The vision executes are real.
Happens to me all the time on nasus, no idea wtf is going on lol.
Dunno if it counts, but I once did a dragon steal as Lulu with her Glitterlance, and dragon was not warded, so it was a blindshot. When I checked the log...and rechecked it to see that I had actually gotten it because I didn't believe my eyes, I was all like
http://buzzsharer.com/wp-content/uploads/2015/04/positive-man-dancing-gif.gif
You don't somehow get the kill, you calculated it. Then you decided to grab a poro snax and walk away while they flee.
Every Teemo evar XD
Psych!
Pretty sure you've used that gif already.
I usually go: Oh. Riot smiles upon me.
Teemo and shaco.
Guster!!!!!!!!!!!!!
Pretty much playing
in a nutshell

You seriously wouldn't believe how many times I accidentally get someone I didn't even notice was trying to recall at the time. And I don't even get the person I was targeting to begin with.
This doesn't really count if you're chasing someone in the jungle as the aforementioned champ with your E up while carpet-bombing the entire place with your Q, though, because normally you're literally just running by all the brush you see until you get the confirmation something died.
I've also done this as
when they were hiding near brush and I was just Qing some monsters. That can be pretty funny.
" Meant to do that "
This guy
Knows what you're talking about.