EDITOR'S NOTE: Sacha Ott, 25, is a software engineer from France who lives in Paris.
I will try to explain to you how I lived yesterday night. I was at the France stadium with two of my friends to see the France-Germany soccer match. At 9 p.m., you would have seen the three of us smiling, in our element.
A few minutes after the match started, a loud sound happened. It seemed just below us. Then there was a second one and a more distant one after that. At the moment, I thought it was okay, it was probably a firecracker set off by fans.