Ask HN: What is your favorite internet rabbit hole?
Browsing medical diagnosis codes... https://www.cms.gov/Medicare/Coding/ICD10/2016-ICD-10-CM-and...Some of the most mildly interesting:V9543XD Spacecraft collision injuring occupant, subsequent encounterW5602XD Struck by dolphin, subsequent encounterX35XXXD Volcanic eruption, subsequent encounterX52XXXD Prolonged stay in weightless environment, subsequent encounterY0881XD Assault by crashing of aircraft, subsequent encounter