Marcin Zendarski with the plant (Picture: Facebook)
A Polish prisoner has really made a hash of it after posting a photo on Facebook of himself standing next to a cannabis plant - from inside his cell.
Dozy Marcin Zendarski smuggled an illegal smartphone into his Austrian jail where he kept in contact with friends, watched TV shows and browsed the web.
He also managed to smuggle in cannabis seeds and grew a plant secretly in his cell, in Garsten jail, Upper Austria.
Proud of his green fingers, Zendarski took a selfie with his plant and posted it on Facebook to show friends he'd outsmarted the wardens.
Unfortunately for him, the photo began to circulate around the internet and was soon brought to the attention of prison officials, who called in extra officers to search the entire jail for mobile phones and any other illegal plants.
They found a multitude of illegal substances, plants, and smart phones - much to the dismay of the other prisoners.
Zendarski is now under special watch after receiving threats from other convicts.