1. He predicts that bitcoin may tumble another 22% to around $1,800.

2. The exchange rate has dropped 13 percent in the past month to 46.7306 rubles per dollar, the worst tumble since 2009.

3. With the result that all four TVs tumble into a state of disrepair.

4. Developers accused of wrongdoing have seen their shares tumble, even as the main property index has surged this year.