What’s the last thing you’ve drawn that made you pause?

Just finished a cross-section of the human heart for a textbook update — not the usual 'ideal' model, but one with a mild valve prolapse. I’d been tweaking the leaflets for an hour, and suddenly realised I wasn’t just illustrating anatomy. I was drawing a body that lived. That moment when the line becomes more than a shape… I don’t know if it’s good, but it felt true. What’s the last thing you drew or made that stopped you in your tracks like that?