The scene where Jack takes a motorcycle and jumps over the Mecha Shark in Sydney is a nod to "jumping the shark", an idiom used to describe a film or TV series overstaying its welcome.
When Nero is uploaded into the Mecha Shark computer, he recites the same words HAL 9000 recites when Dr. Chandra reloads him in 2010: The Year We Make Contact (1984)