Tendo Rider Kicking Caucasus so hard, he flies into a space ship and explodes, taking out the space ship with him. He then goes back in time, taking a giant meteor and smashing it with the other meteor, the one that would destroy the earth. This causes the chain of events that led to the TV series.
Kagami cutting the Big Bad with his swords in the finale when Tendou's Infinity+1 Sword can barely scratch him. Yes, someone one-upped Tendou for once.