Some national leaders can’t resist the urge to get in the driver’s seat of a big powerful truck and masquerade as real-life truckies. All that power. All those childhood fantasies.

Donald Trump made it something of an art form back in March when he climbed into the cabin of a Mack truck and pulled all sorts of absurd faces.

He lacked only the “brmmm brmmm” noises because the truck was parked on the White House lawn. The images hurtled around the world - and at one point, found an echo in pictures of North Korea's Kim Jong-un, another leader who likes big seats in big rigs.

Prime Minister Scott Morrison in a truck on Thursday morning and US President Donald Trump earlier this year. Credit:Fairfax Media

Scott Morrison has been Prime Minister for less than a month, but he couldn’t help himself when faced with a giant Mack truck near Canberra on Thursday.