The French side stole a late 29-27 victory at the Rec yesterday and Bath face a colossal challenge to reach the quarter-finals, having now lost their two opening games.
Home wing Matt Banahan had earlier run riot, the 6 ft 7 in England wing repeatedly blasting through Stade’s defence.
His line-breaking prowess from broken field play was showcased spectacularly as he warmed up for England’s autumn Test series that starts against Australia on 7 November.