Here's how it works:
Say you are an hour and twenty minutes into the new Trek movie. The Urine Dam is about to give way. Old Spock tells young Kirk to "Live long and prosper," Kirk beams out, and if you clicked on the unscramble button just below that on this site, you will know what the next three minutes of the movie will be, so you can run to the loo, and get back. Not the same as seeing it, but at least you'll know what happened.
A tip of the hat to Dal for this one.