Q. My brother-in-law wants to be cremated after he dies and have his ashes shot into space. I laugh when he mentions it, but he’s serious. Do people really do this?   You’d be surprised. The man who invented Pringles potato chips wanted his ashes buried in a Pringles can. Ashes can be scattered in space—or in the great blue yonder from airplanes and balloons—and even in fireworks.   Some people p…