Mohamed Lahouaiej Bouhlel, the man who used a 20-ton truck to run over scores of people in France's Nice is described by his next door neighbours as a discreet, perhaps an unfriendly person at best. But most of them say they could not have imagined him to be a terrorist. NDTV visits the neighbourhood, which now worries of a bad name and a communal backlash of his brutal act.