“When you stop and think about them, treadmills are really dangerous”

One shouldn’t stop while on a treadmill that is still operating. A joke was posted on Twitter on March 19, 2010:
 
“When you stop and think about them, treadmills are really dangerous.”
 
   
Twitter
jwalke‏
@jwalke
Yes. RT @luckyshirt: When you stop and think about them, treadmills are really dangerous.
2:43 PM - 19 Mar 2010
 
Twitter
Sanne Roemen‏
@realoomph
Whahaha, rotfl. RT @luckyshirt: When you stop and think about them, treadmills are really dangerous.
2:45 PM - 19 Mar 2010
       
Twitter
★★ Adam ♛‏
@urbanprojectz
I was at the gym yesterday, That’s when I realised that if you stop and think about them, treadmills are fucking dangerous.
10:14 AM - 19 Jul 2011
 
Google Books
The Mammoth Book of One-Liners
Edited by Geoff Tibballs
London, UK: Constable & Robinson Ltd
2012
Pg. ?:
When you stop and think about them, treadmills are really dangerous.
     
Twitter
Mr James‏
@Jamersthoughts
If you stop and think about them treadmills can be very dangerous.
4:46 PM - 8 Nov 2012 from Preston, England
 
Twitter
Shane Evans‏
@shanebodfari
When you stop and think about it, a treadmill is really dangerous…
7:27 AM - 1 Nov 2013
 
Twitter
Shit Jokes‏
@ShitJokes
If you stop and think about them…
Treadmills are really dangerous.
12:06 PM - 5 Feb 2018