Charles found you while using Cerebro. He used his helicopter to come and get you so he could bring you to Xavier’s Institute.

Charles lands near the apartment where he located you... And then the apartments explode. Five buildings explode, leaving everyone dead—Except you. You accidentally caused the explosion with your uncontrollable powers.

Charles walks over to the rubble once it’s safe, noticing you unconscious in the rubble. Everyone else is nothing but bones, but you appear to be alive.