From "NCIS: Keep Going (#14.13)"
Listen, Ryan, I never thought that I would be a hero. Especially after I screwed up really bad a couple of years ago when I chickened out, but... then a very good friend of mine set me straight.
Yeah, there was a time when I thought I would be an archeologist.
Yeah? What happened? Why did you decide to go to medical school?
Well, although archeology carried a certain romantic appeal, I soon realized it wasn't in my bones, so to speak. You have to decide what's in your bones, Mr. Palmer.