If you've ever wanted to know what it would look like if one of Santa's reindeer was eating a plate of carrots in your own home, you can record exactly that.
Tonight's the night a jolly fat man is going to visit pretty much every single house in the world and drop off some presents for those who have been nice and not naughty.
There's only one more sleep until Christmas, but Santa Claus has got the mother of all night shifts, and he knows he can't miss anywhere because NORAD is tracking his movements, so you'll be able to know where he is in the world.
Everyone knows that Santa can travel at great speeds and his idea of a long night is very different to everybody else's but you'd better make sure you've left something to sustain him on his journey.
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What exactly Father Christmas eats can vary from country to country, in the UK it's normally a nip of something alcoholic and a mince pie, whereas across the pond in the US it's typically milk and cookies.
When it comes to leaving something out for the reindeer, the answer is much clearer: it's carrots.
Obviously, the reindeer don't follow Santa down the chimney and end up inside, that would be ridiculous, so the big man will have to bring them out to his trusty flying team himself.
However, if you wanted to know exactly what it would look like if one of Santa's reindeer was in your living room eating a bowl of carrots, you can record it for free.
That's thanks to a little gizmo McDonald's came up with called 'Reindeer Ready' which it's had working for a good few years.
How to use Reindeer Ready
All you need to do is scan the QR code above on your phone and it'll take you right there, but if you'd rather just get to the app lickety-split you can just click this link.
After that, you'll need to confirm you're 18 because there are some pictures you can take inside the home which will need an adult's approval, and then you do as you're told and take a snap of a particular spot in your house.
Once that's done and you've okayed everything, you'll get a video of a reindeer eating carrots, so if you want to tell your children tomorrow that Rudolph was here and ate some carrots you'll now have the video evidence to back up what you're saying, just take a picture of your garden.
It's Christmassy, and perhaps a little deceptive.
Joe Harker