Reminds me of this anecdote an ex-colleague told me: he was working at GE on an x-ray machine they use during cardiac catheterization to monitor the catheter as

Reminds me of this anecdote an ex-colleague told me: he was working at GE on an x-ray machine they use during cardiac catheterization to monitor the catheter as it moves from your groin towards your heart. The machine recorded the whole procedure, and there was a "replay" option to evaluate the findings I guess. One day they got a bug report which asked for a more prominent warning on the UI if the device was currently in "replay" mode. It turned out that there was an incident where a doctor only realized midway through the procedure that they were looking at the replay footage from the previous patient...