You're messing around on an online auction site, press a random button by accident... and because no one else beats your bid, you have to buy something.
In the case of New Zealand's Graham van de Laar, the accidental purchase was nothing other than Green Day frontman Billie Joe Armstrong's own vintage surf van... which Graham is now selling himself on the same site!
The van features custom GRNDAY license plates, and Billie Joe's signature on the glove box. It looks like this:
To find out more about the van, head here. Just... watch where you click.
Green Day recently posted some mysterious teaser pics from inside the recording studio, suggesting that some new music could (hopefully) be on the way.