Once at a previous company a job candidate was hyper nervous. He had flown in from a few hours away. I hadn't seem that level of nervousness before (or since).

Once at a previous company a job candidate was hyper nervous. He had flown in from a few hours away. I hadn't seem that level of nervousness before (or since). I really felt for him. I ended up taking him out for an early lunch together with some coworkers. That "loosened him up" enough so that we could conduct a proper interview. He ended up being a very valuable and (and liked) employee for like 7 years. And that nervousness - not really visible at all, after he got to know the people at our site. So: My recommendation if you think have a potentially great but also very nervous job candidate: Take your time. Change the scenery. Etc. (In this particular case I was pretty sure he was smart, just based on his application.)