“A bar walks into a man. Oops! Wrong frame of reference” (bar joke)

“A guy walks into a bar…”  is a typical form of what has been called the “bar joke.” A physics version is:
 
“A bar walks into a man. Oops! Wrong frame of reference.”
 
The joke was posted on the newsgroup rec.humor on December 28, 2000.
   
   
Wikipedia: Frame of reference
In physics, a frame of reference (or reference frame) consists of an abstract coordinate system and the set of physical reference points that uniquely fix (locate and orient) the coordinate system and standardize measurements.
 
Google Groups: rec.humor
Zevra & QM101 are proud to present: Qphemisms
Zevra and his little green guy
12/28/00
(...)
A bar walks into a man, oops, wrong frame of reference.
       
Total Annihilation Universe
Physics Jokes
He who rules
30 Aug 2001, 8:10 AM   #1
Old physicists don’t die; their wavefunctions go to zero as time goes to infinity.
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A bar walks into a man, oops, wrong frame of reference
 
Physics Forums
Math/Physics Jokes
Nibs
Apr 12, 2004
(...)
A bar walks into a man, oops, wrong frame of reference.
 
Twitter
℅ 🦁 ❤️
‏@constantiaoomen
A bar walks into a man. Opps. wrong frame of reference.
7:15 AM - 3 Feb 2010
 
Twitter
Travis
‏@BlamePharis
A bar walks into a man. Oops, wrong frame of reference. #internationalsciencejokeday
12:19 PM - 3 Nov 2010
 
Twitter
Drake Akens
‏@DrakeQRandom
Let me tell you a little physics joke.  A bar walks into a man… whoops sorry, wrong frame of reference, let me try that again.
6:55 PM - 25 Oct 2011
 
Twitter
Roma Agrawal
‏@RomaTheEngineer
A bar walks into a man.. Oops! Wrong frame of reference. #physicsjoke #pleasedontunfollowme 😊
2:14 AM - 23 Oct 2012
 
Twitter
Roma Agrawal
‏@RomaTheEngineer
A bar walks into a man. Oops! Wrong frame of reference.
#thexchange @BritishSciFest #BSF16 #ScienceJoke #Relativity #YouAskedYouGot…
3:37 AM - 6 Sep 2016