Usain Bolt was Usain GOOOOOAAAAAAAAAALLLLLLLLTT in his Australian pro soccer game on Friday ... hittin' the back of the net TWICE ... and celebrating with the "shoot" dance!!
The 8-time Olympic gold medalist suited up for the Central Coast Mariners -- wearing a #95 jersey -- and he BALLED OUT in his second appearance for the club ... scoring 2 goals.
Of course, Bolt christened the goals with his signature "lightning bolt" pose for the first goal he scored, an hour into the match ... then followed up with the BlocBoy JB dance for his 2nd goal in the 69th minute.