Taking someone down from a single hit is a one shot as long as he's brought down and can't get up, even if he retains his consciousness.
Kaidou vs Luffy must be a one shot too.
Luffy vs Doflamingo should be a one shot too.
It's crazy how y'all don't see how much kizaru pushed luffy without even trying.
He himself mentioned " you should be out of your ability by now ".
One shots are where other person is still standing.
Zoro vs Hordy
Shanks vs Kid
Kaidou vs Luffy act 1
Where zoro , shanks , kaidou are still standing.
Not like luffy passed out and opponent isn't even KO'ed.