A gymnastics pun is:
 
“Did you hear about the angry gymnast? He just flipped.”
 
The joke was posted on Twitter on September 6, 2012.
 
“Did you hear about the angry pancake? He just flipped” is a similar joke.
 
   
Twitter
Dell
‏@delltreasure
“@BadJokeCat: Did you hear about the angry gymnast? He just flipped.” ahaha
10:37 AM - 6 Sep 2012
 
Twitter
Rashun Garner
‏@RashunRay11
”@BadJokeCat: Did you hear about the angry gymnast? He just flipped.” Lmao
10:37 AM - 6 Sep 2012
 
Twitter
Bains
‏@ABainsy
Did you hear about the angry gymnast? He just flipped.
10:38 AM - 6 Sep 2012
 
d@arlo uncovered
Post subject: Re: The Dull & Inoffensive Jokes Page. PC World Rulz
DIRTYDAVE
Posted: Sun Nov 25, 2012 8:48 pm
(...)
Did you hear about the angry gymnast? He just flipped
 
11 December 2012, MX (Melbourne, Australia), “In a twitter,” pg. 12:
What’s the opposite of LOL, David Koch?—“JOD: did you hear what happened to the angry gymnast? He just flipped!”
   
Twitter 
Bad Joke Cat
‏@BadJokeCat
Did you hear about the angry gymnast?
He just flipped.
11:40 AM - 29 Aug 2014
 
Twitter
Shit Jokes
‏@ShitJokes
Did you hear about the angry gymnast?
He just flipped.
3:11 PM - 8 Mar 2016