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I am super-proud of this video. It will be going live on my channel tomorrow so you have just under 24 hours to watch it early!

If you spot any mistakes then please let me know now. You'll also see changes happening as I'm in there adding the blurb, thumbnail, etc between now and tomorrow.

The bonus Patreon behind-the-scenes footage will also go live tomorrow.

Files

The Coriolis Effect Test: two hemispheres, one sink

Blurb to follow.

Comments

Will Sparrow

Disappointed you didn't commit and go to the North and South Poles.. with your sink... and some antifreeze

Olle Kelderman

if you're able to edit the video before final release, may I suggest a clockwise/anticlockwise counter in each "half" to keep track of things each time you have a result in one of them?

Matt Parker

That is a super-good suggestion. At the time I thought it was making the screen too complicated but now I regret not putting a tally on. The problem was I then also had to indicate what the correct direction should be. On reflection: I think I'll leave it how it is.

Matt Parker

Looks like we've found the limit of my dedication!

Sam Atkins

The plug joke made me chuckle too. I love how much effort you go to for a fairly simple thing. I hope the behind the scenes features your adventures in getting a sink through airport security!

Lucas Werkmeister

Incredible video, can’t wait to see the behind-the-scenes! I was going to guess that you took the sink back to the UK and filmed some more material there after the Australia shoot, but then I read in the video description that the sink stayed in Australia – so I guess it’s all just extremely meticulous planning and nothing’s as spontaneous as it seems?

Matt Parker

I recorded a rough version of the Aust audio first and had that playing in my ear for the UK filming. But it means I had to film loads of different version and reactions because I didn't know what would happen in Australia. Then in Sydney I played the UK recording audio in my ear, and changed to the relevant track depending on what was happening.

David de Kloet

Mistake spotted at 1:12: It's Destin, not Dustin of Smarter Every Day.

Arnim Sommer

I never thought about how much water a sink can hold. But as you're now an expert...

The Live Toad

First rate! I'm going to guess that you did London first. If I'm wrong then you've hidden your tracks expertly.

Ulrich Kempken

Hahaha, what a great video... such dedication... nice work Matt. Love it.

Matt Parker

This sink: a little under five litres. It also entertains me that I used the same bottles for both filming session when they were the least important thing to fly around the globe.

Matt Parker

Yes I did! Well spotted. That is why Australia Matt does the final tally round-up.

Simon Fox

Brilliant video. Kudos to everyone involved making it

mlc

damn it, i just got back from a trip to the Southern Hemisphere but hadn't yet seen this video so i didn't take my sink with me. next time!

David de Kloet

Was that a play on Brady's "Dirk from Verstablium"? If that was intentional, it was too subtle for me.

Cubey

I can only imagine how awkward it must be to try and make two videos sync up in a reasonably realistic and life-like way to form an actual conversation between yourself. But you did a brilliant job, and I would honestly love to see more of that type of editing since it really seems to play off your personality and sense of humour. Regardless though, keep up the great work and I look forward to the new videos you'll create in the future.

Rémy GRANDIN

I would have loved to have the reaction of the people in the boat at 3:50, wondery why a guy was on the border of water with a full sink and 5 litres of water ... It must have took them some time for the info to ... sink in !!

Matt Parker

My correction is a play on that, but the original mistake was genuine.

Matt Parker

Trent and Si were great camera people; Jen was an invaluable helper and both Lucie and Rob put up with having a sink in their living room. Plus Trent did the incredible edit.

Matt Parker

Next time indeed! I'm planning to take two sinks…

Matt Parker

The strangest moment were when people stood in the eyeline of where Other Matt was and had me randomly talking at them; pausing in silence and then responding to seemingly nothing. I had to explain what was happening between takes!