Quiet, stealthy, and infinitely curious. His handler sometimes calls him 'reverse Houdini', or likens him to a bear or racoon, because he seems to have the ability to get into locked containers whenever he pleases, especially if he thinks there's food inside.

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If you ask Rick Astley for a DVD of the movie Up, he won't give it to you because he's never gonna give you Up. However, by not giving you Up like you asked for it, he's letting you down. This is known as the Astley paradox.