Azir's turret counts as an objective for the Blitz cart minigame
I was playing against an Azir in Blitz mode and his team was pushing into us, took the first two towers, and was up to our inhibitor turret. Minigame counter was going off so this guy was thinking, "Yeah I can wall them off and we get a pretty easy objective."
It was the cart minigame. It spawned down the lane his turret was in, and when they tried pushing it to us, it stopped and blew up his tower and we won even though nobody came into contact with the cart during the entire minigame.
That's an... interesting interaction.