Stock prices took a roller-coaster ride this week -- down one day,up the next.

VOA: special.2009.08.21

A water-filled drum called a sod roller can be used.

VOA: special.2009.07.07

It has more than twenty-five rides including several roller coasters.

VOA: special.2010.08.13

Each week,the show took them - and viewers - on an emotional and mind-bending roller coaster ride, through a dizzying loop of supernatural forces, armed conspirators and,of course,romance."

VOA: standard.2010.05.25

"So while we're not really forecasting another meltdown, we're more in the correction camp, you certainly have to warn investors that it is a possibility, we could be in for maybe a slightly smaller version of the roller coaster that we went through in 2008."

VOA: standard.2010.05.21