Tom Curry and Sam Underhill had been hailed as the "Kamikaze Kids" by England coach Eddie Jones during the warm-up matches because of their desire to "hit everything that moves".
On Saturday night, pitted against two of the finest ever proponents of back-row play, the kids became men.
The pair delivered a lung-busting display, equal in its ferocious work-rate and physical relentlessness and true to the brilliant instincts of legendary duo Richard Hill and Neil Back, who were critical to England's World Cup triumph in 2003.
Curry was man of the match but it could easily have been Underhill, so central were the pair to England's blistering performance in the 40-16 win over Australia.
Australia have long been the leading proponents of playing two specialist opensides in the same back row but David Pocock and Michael Hooper, for years acclaimed for their breakdown brilliance and link play, were put in the shade by England's rookie pairing.