Revolving doors are “revolutionary” because they revolve.
     
“Revolving doors are a revolutionary invention” was posted on Twitter by andrea•en•chicago on January 22, 2014. “Revolving doors are revolutionary” was posted on Twitter by geneva copeland on December 23, 2015, and on Reddit—Oneliners on November 9, 2020.
   
   
Wikipedia: Revolving door
A revolving door typically consists of three or four doors that hang on a central shaft and rotate around a vertical axis within a cylindrical enclosure. Revolving doors are energy efficient as they (acting as an airlock) prevent drafts, thus decreasing the loss of heating or cooling for the building. Revolving doors were designed to relieve stack effect pressure in buildings. High-rise buildings experience immense pressure caused by air rushing through the building, referred to as ‘Stack Effect’ pressure. At the same time, revolving doors allow large numbers of people to pass in and out.
       
Wiktionary: revolutionary
Adjective
revolutionary (comparative more revolutionary, superlative most revolutionary)
1. Of or pertaining to a revolution in government; tending to, or promoting, revolution
2. pertaining to something that portends of great change; overthrowing a standing mindset
3. (sciences) pertaining to something that revolves
 
Twitter
andrea•en•chicago
@andreaomn
Revolving doors are a revolutionary invention.
6:09 PM · Jan 22, 2014 from Oak Park, IL·Twitter for iPhone
     
Twitter
Emory
@CaptainEmory
Revolving doors were pretty revolutionary.
This has been a joke; thank you for your time
12:42 AM · Nov 24, 2015·Twitter for Android
 
Twitter
geneva copeland
@deathbymeatloaf
Revolving doors are revolutionary
11:34 AM · Dec 23, 2015·Twitter for iPhone
     
Twitter
Namelass
@DilliBelle
Who invented revolving doors? The invention for its time must have been rather..
*puts on sunglasses and looks at camera*
..revolutionary.
7:57 AM · Jan 25, 2016·Twitter for Android
 
Twitter
Harry
@harrygdavies
Revolving doors are revolutionary
2:01 PM · Aug 10, 2018·Twitter for iPhone
       
Twitter
Hasan
@pizzaguyhasan
Revolving doors: they’re revolutionary
2:26 PM · Dec 12, 2018·Twitter for iPhone
   
Twitter
Kim Harman
@trixieedgewood
Did you hear about the guy who invented revolving doors? It was a revolutionary way to enter buildings.
12:00 PM · Sep 22, 2020 from California, USA·Twitter for iPhone
 
Reddit—Oneliners
Posted by u/webguy1975 November 9, 2020
Revolving doors are revolutionary.
COMMENTS
onairmastering
Dry erase boards are remarkable!!
 
Twitter
Kids and life hacks
@guys_and
Revolving doors are revolutionary.
3:59 AM · Nov 9, 2020·IFTTT