3D printers have been a boon for rapid prototyping, but they’re not without their foibles. Whether it’s a faulty extruder, the piece sliding off the bed, a slipping belt, or any number of other errors, one might walk away from a print that’s begun and come back later to find something he/she had not expected.

Luckily, sometimes these 3D printer fails can come out looking quite interesting. Here are 12 3D printer fails that went right past bad and back to good again. If you’ve had similar experiences, please share them in the comments section.

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