“Tony Stark: [seeing wires running out of his chest] What the hell did you do to me?

Yinsen: What I did is to save your life. That is an electromagnet, hooked up to a car battery. I removed as much shrapnel from your chest as I could, but there are still some pieces left. I've seen plenty of injuries like that. In my village we call those casualties 'the walking dead,' because they take about a week to reach your heart.”