Paying your bills by EFT. It disappears out of your account instantly, but yet can take up to 3 to 6 days to be verified by another financial institution. Take Bpay, they pride themselves on transactions which are supposed to be instant transfer, or next business day, yet if it is going to pay one financial institution, from another, it can take up to that mysterious 3 to 6 days.
Reminds me of that scene in Willy Wonka...Wonka Vision....it disappears into millions of tiny pixels, flies through the air to be then regenerated again. Just where does it disappear to between the time it disappears instantly, to the time it reappears again.
Maybe banks have their transfer station on mars or something.