IT'S all that you can't leave behind – yet forgetful commuters have managed to do just that.
From a box of live crickets and a rabbit, to a wheelchair and a life-size cardboard cut-out of Chic guitarist Nile Rodgers, all manner of strange and unusual items have been abandoned on buses, trains and trams.
The National Transport Authority (NTA) has compiled a list of the top 10 most bizarre things that have been left behind on public transport.
The oddities include household items such as a kettle, a lava lamp and – in the era of mobile phones a particular curiosity – a house phone.
Also left behind was a rabbit and a box full of live crickets and, rather hard to misplace, a five-foot-tall artist's canvas.
And perhaps travelling by public transport had some magical restorative powers for the ill and disabled because train and bus workers also have discovered an abandoned wheelchair and a heart monitor.
However, claiming the top spot for the most outlandish item left behind by a passenger was a life-size cardboard cut-out of Nile Rodgers, right, the dreadlocked guitarist from Chic, who has penned hits such as 'Le Freak'.
After finding himself the top of the list, Rodgers alerted his 94,000 followers on Twitter to the NTA story.
However, the musician himself is no stranger to leaving things behind on public transport as he told how earlier this week he left his beloved 1959 Fender Stratocaster guitar, known as The Hitmaker, on a train in Connecticut.
He was so immersed in a telephone conversation that he almost missed his stop and ran from the train leaving his prized guitar behind.
It was only as his taxi pulled up outside his house that he realised he had forgotten his guitar.
"I felt like I was a parent who'd lost a child. I was terrified," he said.
After frantic phonecalls and searches, he was on the "brink of a nervous breakdown" when a police officer suggested he try a train yard at the end of the line and there he found it lying next to a skateboard.
"One nano-second later there was jubilation, joy and extreme gratitude in my heart," he said.