Engineering profession idea
So, similar to the inflatable water shoes let engineers make something for ground mounts allowing them to fly, this allows all the cool ground mounts we get to also be usable when general flying is unlocked.
The device
U.M.A.D
(Universal Mound Ascending Device)
Deploy your U.M.A.D from your belt creating a rocket powered platform under your favorite ground bound vehicle allowing them to take to the skies.
(Fine print: we hold no responsibility for any form of malfunction)