By luck alone, the UK avoided an awful tragedy last Friday as a group of government officials on bicycles–including London mayor Boris Johnson and the country’s top transportation minister–was nearly wiped out by a freak traffic accident.

Johnson and his party were riding normally through the neighborhood of Canary Wharf when a delivery truck drove past, seemingly going too fast on the narrow street. As it came abreast, the vehicle’s back door flew open, hooking a parked car and hurling it across the street, narrowly missing the cyclists. The whole incident was captured by a security camera.

Read more over at the Infrastructurist Blog