http://www.buzzfeed.com/peggy/tree-grows-in-mans-lung
Twitter loves this super-gross picture. If you like lung-tree, maybe you'll enjoy eye worms.
A 5cm-long fir tree has been growing in the lung of a man who complained he had a strong pain in his chest and was coughing blood. WARNING: GROSS PHOTO. Umm, don't click on this if you happen to be eating. That tree is sort of cute, though.