Nic is a very skilled player and he demonstrates how easy it is to play with dynamics and tonal variation when being supported by a sympathetic band. Which in turn of course creates tension in the music being played.
For the vast majority of jammers though this isn't the case. Most jam scenarios I've seen/been to entail the band getting louder when the harp begins to solo and crowding it so much that it can't breathe. Most are so guitar orientated and at the rock end of the blues spectrum, that they can't even begin to comprehend what a harp player needs in the way of backing from the band. Hell a lot of jam session guitar players are so uneducated they can't even distinguish between different types of shuffle, let alone any other kind of groove.
Nic is extremely fortunate to be able to play with a band and at jam sessions where the players "get it". It's always a pleasure to listen to him do his thing.