“How much does a rainbow weigh?”/“Not much, they’re actually pretty light.”

A rainbow riddle is:
     
Q: How much does a rainbow weigh?
A: Not much, they’re actually pretty light.
 
“How much does a rainbow weigh?... Hardly anything. They’re pretty light!” was posted on Twitter by Funny Teacher on May 28, 2020.
 
“Even the heaviest chandelier is pretty light” is a related joke.
   
   
Twitter
Funny Teacher
@SchoolJokesK_12
Hey @JennyCraig How much does a rainbow weigh?... Hardly anything. They’re pretty light! https://bit.ly/36zoCaB #rainbows
11:10 AM · May 28, 2020·Twitter Web App
   
Twitter
Moomii
@Moomii_Moo
Replying to @PrezesPan and @BellaRayne10
Hmm rainbow jokes…
How much does a rainbow weigh?
Not much.. they’re pretty light. 
Where do naughty rainbows go?
Prism
6:33 PM · Jul 30, 2020·Twitter Web App
   
Twitter
| farhan | Spouting whale here and there
@0tr45hm0uth
Replying to @0tr45hm0uth
How much does a rainbow weigh?
Hardly anything. They’re pretty light.
1:55 AM · Aug 26, 2020·Twitter Web App
   
Twitter
Kitengela Hot Glass
@kit_hot_glass
How much does a rainbow weigh?
-Not much, they’re pretty light. =
#kitengelahotglass garden jewellery online #ClickmyGlass @ http://kitengela.com (link in bio)
6:00 AM · Dec 20, 2020·Zoho Social
   
Twitter
David Brown
@DavidBr62367531
Replying to @OttoHuang120 and @catturd2
How much does a rainbow weigh?
Not sure exactly, but it’s pretty light!
4:43 PM · Feb 26, 2021·Twitter for iPhone
 
Reddit—Jokes
Posted by u/Raevix June 25, 2021
How much does a rainbow weigh?
Not much, they’re actually pretty light.
 
Reddit—Dadjokes
Posted by u/Raevix June 26, 2021
How much does a rainbow weigh?
Not much, they’re actually pretty light!