No sooner has a [synthetic] drug been blacklisted than chemists adjust their recipe and start churning out a subtly different one. These “legal highs” are sold for the few months it takes the authorities to identify and ban them, and then the cycle begins again.
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.
high (i.e. intense) heat; high (i.e. full or quite) noon; high (i.e. rich or spicy) seasoning; high (i.e. complete) pleasure; high (i.e. deep or vivid) colour; high (i.e. extensive, thorough) scholarship