In November 2011, Paul Simonon revealed that he took part in protest against oil rig earlier that same year, while working as an undercover Greenpeace activist on board one of their ships. Simonon boarded the ship masquerading as an assistant cook, joining the other activists demanding that Cairn Energy, one of the largest oil and gas companies in Europe, make public its response plan for an Arctic oil spill possibly on the scale of the BP disaster.

Simonon produced the below artwork on his cell wall during his detainment, with art supplies from secret trips to the art store with a wise guard whom agreed to keep his secret after recognizing him, according to Greenpeace’s blog.

Check out this video Greenpeace posted on the incident: