After cockroaches and geckos flip over ledges, they can then continue to run upside-down under surfaces.
The next thing you know, the track is a figure eight, or a portion of it has lifted like a Hot Wheels track and you're running upside down against the laws of gravity.
Hetal Mehta, UK economist at Daiwa Capital Markets, said: "As expected, the recent run of upside surprises on GDP growth has led the OBR to revise up its forecast for 2010.
But it does suggest the underlying trajectory remains modest enough that periodic airpockets should be expected, and argues against extrapolating any run of upside surprises.The more fundamental reason to worry is the ostensibly good news that unemployment had fallen to its lowest since late 2008.
"You're trying to run an upside-down pyramid in a pyramid structure," he said.
"You're trying to run an upside-down pyramid in a pyramid structure," says Tim McDonald, author and policy advocate with Education Evolving, an educational think tank based in St .Paul, Minn.
If longer legs allow spiders to run faster upside-down, we expected to see a positive relationship between the FTL residuals and bridging speed and also that a regression model of FTL residuals predicting bridging speed would be more parsimonious (i.e., lower Akaike's Information Criterion, AIC) than a model predicting running speed on the ground.
"If in the first half-hour, the stock is down only a small amount from the opening, it will probably make another run on the upside," he said.
"Every time we have a run to the upside, people use it to take out money, as opposed to that real rush to try to push things higher," said Peter Dunay, chief markets strategist at Wall Street Access, a brokerage firm.
