Humerus Hacks is a medical-teaching podcast that works through clinical topics in open conversation, and analogies do most of the explaining. Recent episodes begin with an acknowledgement of the Wurundjeri people of the Kulin Nation, on whose land the show is recorded. Then comes the catchphrase, a cheerful promise to teach the listener things. The recent run covers a wide range of subjects, all of them clinical. '#69 - MET CALL: Under Pressure (Hypotension)' works through obstructive causes of low blood pressure, with Lauren joining again when she is close to finishing medical school. Pulmonary embolism is explained by following the blood. It travels from the right heart to the lungs and back to the left heart, and when a clot blocks the way, less blood arrives and less gets pumped out. Cardiac tamponade comes next, framed around the pericardium. The two-part 'Macrodata Refinement' set is billed as 'Bloods for Dummies' and is aimed at students just starting their clinical years. A high hemoglobin might be the body making up for too little oxygen, or it might be overproduction, such as a blood cancer whose name one speaker admits to never pronouncing properly. Testosterone given in gender-affirming care comes up as another cause, along with the value of a baseline reading. Creatinine becomes a backlog in a clogged drain and eGFR is set apart as the longer-term measure, before one speaker starts in on a story from an old apartment. 'Only 2% Shall Pass' covers the immune organs in two halves, with the spleen and thymus first and the lymph nodes second, after the hosts admit they got over-enthusiastic. There is a Maltesers pun along the way. The spleen gets two portraits: the Shakespearean sense of an organ of feeling, and a pathology textbook's drier description of a filter for the blood, divided into red pulp and white pulp. The thymus is likened to the audio-visual crew at an event, unnoticed until something goes wrong. The lymphatics are cast as the body's hidden sewer, remembered through Healthy Harold, a health-education van in New South Wales with a puppet and posters of the body. '#44: How to FOAMed!' was recorded in a hospital in Leeds with Johnny, an NHS doctor and core medical trainee. The conversation recalls a meeting three years earlier at a medical education conference at Stanford, after a run of meme-swapping on Twitter, and it closes by agreeing that this is how nerds meet. Mistakes tend to stay in. One episode keeps a fumbled opening lyric for the sake of continuity, and another closes with a sign-off that falls apart into 'stay hacked' and 'hack off'. A listener gets revision that sounds like people thinking aloud: concepts built from everyday images, sometimes checked against a textbook, and delivered with no pretence of polish.