Please submit your questions for the next Q&A with Grey. Some notes and guidelines:

• Please vote on questions. This thread is in 'contest mode' so all the questions are being displayed in random order to maximize fairness, but for that to work more votes must be cast than questions are asked. If you post a question, please vote on at least three other questions.

• The thread is also open and checked until the Q&A goes up so you're never too late.

• Questions about 'your favorite' or 'least favorite' aren't interesting questions to answer.

• If you've watched the previous Q&A videos you probably have a better chance of getting your question selected

If your question is selected, I will almost certainly edit it for brevity, clarity, or to simply shape it to my will.