Al Williams and I were talking about water rockets on the podcast the other day ... pressurize it a bit with air, and then let it go. Water gets pushed down, bottle flies up.

We have fond memories of air-water rockets, which were always a dime store purchase for summertime fun in the pool. Despite strict guidance from mom to shoot them only straight up, the first ...

likened the process to a "stomp-rocket" toy, which works by stomping on a gas-filled chamber that propels a rocket into the ...