A Sydney man who has an Opal card chip implanted under his skin is now threatening legal action because transport authorities have cancelled the card.
Going by the name Meow Ludo Disco Gamma Meow Meow, he says he'll fight for the right to swipe.
As well as the Opal card implant, the "biohacker" has his Bitcoin address on his thumb and a business card that sits just behind his wrist.
The self-described cyborg - a fusion of man and machine - believes he's the future.
But the government disagrees, terminating his card, and Meow is now in court fighting a fine from Transport New South Wales for having an invalid ticket.
"There are a lot of people studying this now as one of the first cyborg rights cases in the world," he said.
"Do I own technology that's in my body, even if another company wants to licence it to me? And how far do their rights extend?"
- Sydney commuter implants Opal card chip under his skin
- Road tolls, car rego and parking fines - put it on your Opal card
- Opal card changes to make travel easier
For now, Meow will have to buy a ticket or use an Opal card the way everyone else does.
But he says if he loses his case, there's nothing stopping him getting a new chip inserted in his hand.
"I'm looking forward to seeing Transport NSW in court," he said.