Elton Jantjies' drop-goal a minute from time earned the Barbarians a thrilling 38-35 win over Argentina.
The teams shared 10 tries at Twickenham but it was a Jantjies' late intervention that decided it after the Barbarians had recovered from a 28-14 half-time deficit.
Juan Manuel Leguizamon opened the scoring just three minutes in against his fellow countrymen with Handre Pollard converting.
But Argentina turned things around and tries from Matias Orlando, Ramiro Moyano, captain Pablo Matera and Sebastian Cancelliere saw them take a 28-7 lead after 18 minutes.
The Barbarians were awarded a penalty try seven minutes before the break when Matera was penalised for pulling down a maul behind the Argentina try line.
Siya Kolisi went in for the Barbarians in the 48th minute from a rolling maul but Argentina quickly hit back through a close-range Julian Montoya score.
But Damian De Allende and Lood De Jager scored tries for the Baa-Baas to level the scores at 35-35 with six minutes remaining before Jantjies decided it when he dropped into the pocket after De Jager won clean lineout ball.