When Usain Bolt completed his triple treble, earning his ninth and final Olympic gold medal with the Jamaica 4x100m relay team, the world reflected on an all-time great and his illustrious track career.

But just hours later in Rio’s Olympic stadium, with the lights out, those who hung around might have been fooled into thinking the Jamaican was training for a 10th Olympic gold.

Il est 1h40 du matin. Je travaille au stade olympique. Les lumières sont éteintes. J'entends du bruit #UsainBolt pic.twitter.com/S9gVaHmQk9

— Franck Ballanger (@FranckBALLANGER) August 20, 2016

Franck Ballanger, a journalist in the Olympic Stadium, caught the footage in the early hours in Rio as Bolt engaged his fans around him with the traditional slow clap.

And true to form, the fastest man in the world put in a pretty good throw.

Il aurait lancé à 56 mètres ! https://t.co/wfOO1T5OmP

— Franck Ballanger (@FranckBALLANGER) August 20, 2016

Just saw @usainbolt bolt throwing the javelin at Olympic Stadium, after winning his 9th gold. It was longer than 1 of the decathlete's marks

— John Pye (@byJohnPye) August 20, 2016

The throw was still some way off Germany’s Thomas Rohler, who posted 90.30 metres as he claimed the men’s javelin gold. But with Bolt nearing the end of his sprint career, there’s every chance a few field athletes will now be looking over their shoulder…