The Hippocratic Oath requires doctors to commit to a code of ethics about saving, and protecting life. Chief among its principles is “do no harm.” World War I was hell though, so the medics in Battlefield 1 can be forgiven for doing as much harm, if not more, than good.

In the Latest Battlefield, players utilizing the medic class can use their syringes not just to heal teammates but also to waste their opponents. The YouTuber It’s A Mirage put together the short video real above to show just how much damage these wartime doctors can deal. Naturally, it’s titled “Putting on a Clinic.”

You can read our review of Battlefield 1, which Heather Alexandra called “a remarkable overachiever,” here.