Voldemort walked into the nursery room of the Potter's home in Godric's Hollow, killing the babysitter and making his way over to the two babies in the crib. He stood there for a while, deciding which one to kill, when the boy with the Avada Kedavra eyes reached up to him through the bars, his little fingers attempting to grab his wand. It was then that Voldemort decided this boy would be the one the prophecy referred to and turned his wand to him, "Avada Kedavra!"
The cottage shook with the power of the spell and Voldemort staggered back, fear flashing in his eyes, "NOOOOOOOOOOOOO," he screeched, as the spell backlashed and his body vaporised and his wand clattered to the ground, Wormtail swiftly grabbing it and stowing it in his robes. Then Wormtail started changing, shrinking down til he was the size of a common brown garden rat, and scampered away.
All of a sudden, Sirius Black ran into the room, looked around and dashed back out again, narrowly missing the Potters and Albus Dumbledore. This time, he headed towards his boss' office. He knew since he persuaded James to switch secret keepers that everyone would think he did it, so he ran into Amelia Bones' office and started explaining things very fast. "Hold up Black. Say that again, this time slowly so I can understand you." she told him, and while she recorded the conversation, he proceeded to tell her how he had James switch secret keepers from him to Peter Pettigrew as he thought he would be too obvious. He explained how he would then go around and act as the secret keeper so Peter could hide. Then he explained how the night went. How he had gone to the Order meeting with James and Lily, and left when Lily got a bad feeling that something had gone wrong. Telling her that he ran into the house and found the twins alive before running to prove his innocence to Amelia, narrowly getting out of there before the Potters and Dumbledore arrived. "And I think there's something going on with James and Lily. Up until last month, they doted on Hadrian-Harry, but then last month, something switched and they started ignoring Harry, so I've been taking him during the day to care for him as his parents won't."
"I'm being serious Amelia, no, not a name joke, I really am. I think something or someone has changed James and Lily, and not for the best."
"All hail Mason Potter, the Boy-Who-Lived!"