Pain is the only human process that is completely defined by the person experiencing it. Now the more I do this the more I learn that people are very different in how they respond to the pain I put them through. You say 'potato' I say 'buh buh,' that type of deal. Now I would say that the majority, maybe 90% of my projects, scream out right away. But then some of them surprise me. They grit their teeth for as long as they can until they pass out and they never make any sound at all. Now they're not any braver than anyone else, they're just different. Which is what makes this job so interesting. You really get to see what people are made of. Literally.