# Found a Glorious TikTok... by @TrungTPhan on Twitter # Found a Glorious TikTok... <cite>by @TrungTPhan on Twitter</cite> ## Metadata - Author: [[@TrungTPhan on Twitter]] - Full Title: Found a Glorious TikTok... - Link: https://twitter.com/TrungTPhan/status/1439246021536616456 ## Highlights ### ([View Tweet](https://twitter.com/TrungTPhan/status/1439246021536616456)) > Found a glorious TikTok account: "Design Secrets", which explains the technical and psychological design rationale behind everyday things. Here are 14 gems 🧵 ### ([View Tweet](https://twitter.com/TrungTPhan/status/1439246028281057282)) > 1/ MOVIE THEATRE SEATS & CURTAINS are red because it is the first color the human eye loses sight of when lights dim (or in darkness). With this effect, people focus on the show instead of surroundings.  ### ([View Tweet](https://twitter.com/TrungTPhan/status/1439246032840249349)) > 2/ DRAIN PIPES are U-shaped to create a one-way valve that lets water flow but also traps dangerous gases. ◻️ Water flows down ◻️ The U-shape collects some water, creating a "seal" ◻️ Gases from the plumbing can NOT pass up to the sink because of the "water trap"  ### ([View Tweet](https://twitter.com/TrungTPhan/status/1439246042118049794)) > 3/ SWISS RAILWAY CLOCKS run 1.7% faster than normal clocks, meaning the second hand hits the top of the clock after 58 seconds (instead of 60 seconds). This gives a train 2 full seconds to arrive at a station "on time", which helps maintain the illusion of punctuality. https://t.co/C3LNSrQIm9 ### ([View Tweet](https://twitter.com/TrungTPhan/status/1439246047037968386)) > 4/ LONDON PUBS have funny names ("Elephant & Castle", "Bat & Ball", "The Red Lion", "The Owl and The Cat") because many are centuries old... ...when a large part of the population was illiterate, so owners "named" their pubs after recognizable objects that could be seen.   ### ([View Tweet](https://twitter.com/TrungTPhan/status/1439246052008157190)) > 5/ AIRPORTS BAGGAGE CLAIM is often placed as far away from the arrival gate as possible. Why? To limit how much passengers "wait around" for luggage. The extra distance gives workers time to unload luggage while passengers are walking to baggage claim.  ### ([View Tweet](https://twitter.com/TrungTPhan/status/1439246057146228738)) > 6/ PHARMA PILL BOTTLES are this type of orange because the color blocks out UV lights (which can damage medicine). But the color is also transparent enough for people to see how much meds they still have.  ### ([View Tweet](https://twitter.com/TrungTPhan/status/1439246061416026121)) > 7/ TENNIS COURTS almost always face north-south (instead of east-west). This is because the sun rises in the east and sets in the west, which would be blinding for someone serving a ball at those times of day.  ### ([View Tweet](https://twitter.com/TrungTPhan/status/1439246064867893257)) > 8/ EMERGENCY EXIT DOORS only *push* outwards. This standard was implemented after a Boston restaurant (Coconut Grove) caught on fire in 1942. Hundreds of people died because the exit doors were *pull* only, which couldn't open with so many people pushing up against it.  ### ([View Tweet](https://twitter.com/TrungTPhan/status/1439246069108334592)) > 9/ AIRPLANES are mostly color white. Here is why: ◻️ White reflects sunlight (prevents overheating) ◻️ Paint is expensive ($50-200k to paint a 747) ◻️ Paint is heavy (more weight = more fuel) ◻️ Easier to spot cracks ◻️ In case of ocean crash, white contrasts w/ water for search  ### ([View Tweet](https://twitter.com/TrungTPhan/status/1439246072472170497)) > 10/ DRINK GLASSES at bars and clubs are all see-through. It's psychology 101: everyone can see how much booze you have left in your glass and if you walk around the club with an empty drink, you look like a cheap ass...so you buy another one (or bum one from your friend lol).  ### ([View Tweet](https://twitter.com/TrungTPhan/status/1439246076897206276)) > 11/ CONVERSE SHOES have fuzzy fabric on the soles. It's for tax reasons: Import taxes on shoes are 25%. However, if half the sole is fabric, it's classified as a "slipper" and the tax is 2%. This is known "tariff engineering" and happens in many other industries.  ### ([View Tweet](https://twitter.com/TrungTPhan/status/1439246081229869056)) > 12/ AIRPLANE WINDOWS have rounded corners. The world's 1st commercial jet (106 Comet) had square windows. The corners on these windows caused stress fractures and resulted in fatal crashes. Rounded corners distribute the stress more evenly, helping keep integrity of the frame.  ### ([View Tweet](https://twitter.com/TrungTPhan/status/1439246084639887366)) > 13/ THE EAST SIDE OF MANY CITIES are poorer than the west. Majority of cities are located in the middle latitude of the globe, where winds typically blow *west to east*. With pollution blowing in that direction, wealthier residents moved to the west side.  ### ([View Tweet](https://twitter.com/TrungTPhan/status/1439246086653186057)) > 14/ If you enjoyed that, I do interesting threads like this 1-2x a week. Follow @TrungTPhan to catch them in your feed. Here's another one that might tickle your fancy: https://t.co/NlIExwM9RG ### ([View Tweet](https://twitter.com/TrungTPhan/status/1439249795416092684)) > 15/ We will discuss these baller designs with @jackbutcher on the next episode of Not Investment Advice (NIA): https://t.co/pVVkOVykh7  ### ([View Tweet](https://twitter.com/TrungTPhan/status/1439250125650415618)) > 16/ Here is the most popular Design Secrets TikTok: “Why cartoon necks have collars”. Def follow this glorious account: https://t.co/DK7g8kgftc https://t.co/1DnyAy3nri ### ([View Tweet](https://twitter.com/TrungTPhan/status/1439272259500195844)) > 17/ Here is the Twitter account for the Design Secrets creator: @SvilenK. h/t @IvanNikolow for pointing out.