Big wheel keep on turning, Proud mary keep on burning, And we're rolling, rolling, Rolling on the river.’  I don’t know why but that Tina Turner classic always comes to mind when work matters start falling into place.  I think it’s the word ‘rolling’ which I associate with being ‘on a role’.  When highly enthused, as it plays in my head, I add in the dance movements and have my hands do the steam train action and when crescendoing occasionally add the celebrated Turner head thrust.