After braking, Mr Rynston said he "saw a flash of silver and felt a sudden impact" on the passenger side of his vehicle.

BBC: Northampton

Alison Cox, founder and chief executive of Cardiac Risk in the Young (CRY), said the incidence of cardiac death by sudden impact in the UK were not that high.

BBC: Death risk from freak sports injuries

While deficit reduction would be, in general, beneficial over the long term, the sudden impact of the tax increases and reduced governmental spending could shock our economy and the financial markets.

FORBES: Austerity And Bankruptcy Not The Only Fiscal Cliff Endgames

For instance, one examined the impact of the sudden and notorious inflow of refugees to Miami from the Cuban port of Mariel in 1980.

ECONOMIST: Workers of the world | The

So, unlike with a sparsely traded small-company stock, Wall Street trading desks can cushion the impact of a sudden pickup in ETF buying or selling by creating or redeeming ETF shares.

WSJ: No Need to Avoid All Low-Volume ETFs

As the anticipated time-to-impact decreases, CMS prepares the car for sudden braking by moving the brake pads nearer to the brake disks, and finally, when the system concludes that a collision is less than one second away, it starts to apply the brakes itself.

ECONOMIST: Cars that drive themselves