Way back on August 15th I pre-ordered Prometheus (DVD + E-copy) from Sainsbury's (they had an offer on and I had some e-vouchers and discount-codes to use, so it cost me next-to-nowt).
The official release date is October 8th.
Today's date is only October 4th, yet Sainsbury's have just sent me an email to say that they've already put my pre-ordered DVD in the post.
How does that work?