“I saw a clown doing sit-ups. Funny how things work out. (via @russell_kane)” was posted on Twitter on March 2, 2012. The joke is from English comedian Ruseel Kane.
 
   
Wikipedia: Russell Kane
Russell Kane (born Russell Grineau in 1975) is an English writer, comedian, and actor. He was nominated for the Edinburgh Comedy Awards at the Edinburgh Festival Fringe, winning the main prize in August 2010.
     
Twitter
Tim Goodwin
@timgoodwin
Just saw about 20 clowns doing sit-ups in the park. Funny how things work out…
9:49 AM - 8 Nov 2011
     
Twitter
jay stevens
@JayMcr
Just seen some clowns in the gym! Funny how things work out! #Sorry
4:55 AM - 13 Nov 2011
   
Twitter
WH
@nyeewinghoong
I saw some clowns doing sit-ups. Funny how things work out.
7:06 AM - 2 Jan 2012
   
Twitter
I’m a fat cat
@5h4un_b4u3r
Saw a couple of clowns lifting weights n doing push-ups. Funny how things work out. LOL
1:13 AM - 24 Jan 2012
 
Twitter   
Matt Bunk
@mattbunk
I saw a clown doing sit-ups. Funny how things work out. (via @russell_kane)
8:00 AM - 3 Mar 2012
   
Twitter
Luis Alberto ☯
@Ito747
“I saw a clown doing sit-ups. Funny how things work out.” -Russell Kane
9:59 AM - 18 Mar 2012
   
Daily Star (London, UK)
Our fave jokes to drag Britain out of ‘laughter recession’
BRITAIN is gripped by a “laughter recession” and is the least fun decade of the last 60 years.
By Daily Star Reporter / Published 4th October 2012
(...)
“I saw a clown doing sit-ups. Funny how things work out.” – Russell Kane
 
Twitter
Comedy Quotes
@ComedyQuotesTV
“I saw a clown doing sit-ups. Funny how things work out.”  #RussellKane @russell_kane
5:31 PM - 10 Oct 2012
 
Facebook
The Chunky Cheese Co.
June 24, 2013 ·
“I saw a clown doing sit-ups. Funny how things work out.”
- Russell Kane
 
Twitter
Shit Jokes
@ShitJokes
I saw a clown doing sit-ups.
Funny how things work out.
11:56 AM - 4 Nov 2015
   
Google Books
Comedy Writing Secrets:
The Best-Selling Guide to Writing Funny and Getting Paid For It (Third Edition)
By Mark Shatz and Mel Helitzer
Blue Ash, OH: Writer’s Digest Books
2016
Pg. 92:
I saw a clown doing sit-ups. Funny how things work out. —Russell Kane
 
Twitter
Comics Tell Jokes
@ComicsTellJokes
“I saw a clown doing sit-ups. Funny how things work out.”
Credit @russell_kane
8:10 AM - 22 Mar 2018