ballooning

1. (uncountable) The sport or hobby of flying in a hot-air balloon.Examples: "When he retired, he took up ballooning."; "Like most human activities, ballooning has sponsored heroes and hucksters and a good deal in between. For every dedicated scientist patiently recording atmospheric pressure and wind speed while shivering at high altitudes, there is a carnival barker with a bevy of pretty girls willing to dangle from a basket or parachute down to earth."uncountable