Meanwhile, in Australia, another area of fund concentration, stocks are mired in a 14-month-long slump as Chinese demand decelerates.

FORBES: Investing

When the Alcubierre-driven ship decelerates from superluminal speed, the particles its bubble has gathered are released in energetic outbursts.

MSN: Warp speed? Slowing down could be a real killer

The growth in the first quarter decelerates below forecasted expectations causing these same economists to fall over themselves with downward revisions.

FORBES: Recessionary Differentiations

Oberweis buys companies growing sales and profits at least 30% per year and generally holds them until the growth rate decelerates.

FORBES: Euronet: Prepaid Mobile Phone Mania

This slowing effect is used by Lotus to simulate engine braking, in which resistance inside an internal-combustion engine decelerates the car.

ECONOMIST: Fast cars will go even faster with electric power

While those issues are most likely transitory, larger concerns loom as the pricing tailwind decelerates and more signs of the running category slowing become evident.

FORBES: Footwear's Holiday Winners Are LULU And SHOO

Digital entrepreneurs keep innovating faster, while the pace of regulators decelerates.

FORBES: The Madness of Regulating VoIP as a Public Utility

If GDP just decelerates, I'm a winner with this weighting.

FORBES: How to surf the yield curve

Yet both will fall back to earth in 2013 as unit growth decelerates, margins come under pressure in response to intensifying competition, and earnings growth drops into the low single digits.

FORBES: Year Of The Snake Investment Guide: Bigger TV Screens, Data Bulge Ahead

Here's an off-the-rack sports car with lateral adhesion in the range of 1 g, a car that hits 60 mph in 4 seconds (the 394-horsepower Carrera S with the dual-clutch PDK gearbox), a car that trips the trap lights in about 12 seconds and decelerates from 60 mph to 0 in about 100 feet.

WSJ: 2012 Porsche 911 Carrera S Review: A Magnificent First Stab | Rumble Seat by Dan Neil