Words are inadequate

Thanks! It really was. I literally had to go back to my room and cry for a bit.

"Harder than it sounds" maybe? Also that phrasing really applies to people who don't know anything about what's being done, sort of a "tricks that impress the masses" vs "tricks that impress other performers" kind of thing.

The timing actually isn't what I see as the hard thing: it's either rhythmic or simple-syncopated, there's not a whole lot of trickiness going on there. What gets me is how bloody difficult it is to get reasonable-sounding multinote chords out of an orchestral stringed instrument in the first place, and for him it's ... effortless.