Did a trial lesson with a gent whose day job was digging ditches in JCBs. He very quickly had all three controls for most of the 30 minute trial lesson, and had a half decent stab at a hover.
But if someone spends all day looking outside of their work environment and manipulating a remote bucket, I suppose it was to be expected.
Even so, I always had my hands and feet very close to the controls, and even with this chap,