A Japanese artist has created what may be the most disturbing computer accessory yet: a mechanical tumor.

The tumor (or ‘brain’) expands and contracts when your CPU is active.

The Register notes:

The artificial excrescence – which looks like a cross between a human brain, a Yorkshire Pudding and something out of Blake’s 7 – isn’t real, of course, but its movements mean it looks the part.

Inside Mechanical Tumour is an actuator motor and air compressor, the artist said. Open lots of files and run a video, and the PC’s CPU will start working harder. This forces the air compressor to push more air into the tumour, which expands.

It is not known whether a USB version will be available any time soon, though I for one would love to see one.