Adding to the sideline amusements was Adams acting as his own roadie as he swapped guitars and playing positions, explaining he stood for some songs simply to stop getting "a numb ass".
Out front, all that restraint might have risked something similar in his audience. But if the delivery was low wattage, Adams' vivid lyrics and shining melodies burned just as bright as he reached back to his pre-solo years in alt-country band Whiskeytown (16 Days) and pulled tracks off all of his many albums since.
Once-rowdy rock songs like Rescue Blues and New York, New York came rendered as piano ballads.
But mostly it was just Adams on his softly strummed and picked guitar sitting in behind his bruised, yearning voice as it picked the eyes out of the best singer-songwriter songbook of the past decade.
No, it didn't kick - or indeed, numb -ass.
But it was quietly, utterly brilliant all the same.