Graves and Kayle taking nexus + 3 turrets and inhib in under 25 seconds

So this just happened. We were pretty easily winning a game, but somehow the enemy team got about 25 seconds of time to attack our base. 33 minutes in: Level 18 Graves (7/6/7) and level 18 Kayle (7/9/8) had quite a road ahead. First they had to face the inhibitor turret, then they encoutered Rammus, they had to destroy an inhibtor, 2 nexus turrets and the nexus. And they managed to do this within 24 seconds, with just the two of them.. Better yet, Caitlyn was reviving in 8 seconds when the nexus and both nexus turrets were still up, yet they achieved to destroy the nexus before cait even spawned...

You can say whatever you want like, these guys were level 18, it was 33 minutes, it's Graves and Kayle what do you expect? Still doesn't make it right. They could have taken that base with the 2 of them if we were pushing a lane or even if we were doing drake or baron. You might not even make it in time recalling to defend it. This is just bananas.