On Thursday night, in Nice, France, thousands of people were gathered on a seaside promenade to watch the Bastille Day fireworks.
Then a man in a truck accelerated into the crowd, and kept going. His attack killed more than 80 people, and didn't end until police shot him dead.
Imad Dafaaoui, a Moroccan university student, was horrifyingly close to the truck. He told Morning Edition he saw a crowd of people running toward him, with a white truck behind them, and he too turned to flee.
But he made a nearly fatal error: he ran in the wrong direction.