Water Flowing Uphill

A candle is placed in a crystallizing dish containing water and lit. A beaker is placed upside-down over the candle. The candle will eventually go out and the water level in the beaker will rise.
CxHy­ (wax) + (x +y/4)O2 (g) → x CO2 (g) + (y/2)H2O (l)

Collapse a Soda Can

When a small amount of water is heated inside the can, steam is produced, filling the can. When the can is inverted into cold water, all of the steam condenses quickly causing the can to implode.