“A guy walks into a bar…” is a typical form of what has been called the “bar joke.” An auto-correct version is:
   
“Auto-correct walks into a bar. And the batman says, ‘Why the log fence?’”
   
This is a variation of the popular version involving a horse: “A horse walks into a bar and the barman says, ‘Why the long face?’” The joke was posted on Reddit—Jokes on February 3, 2015.
 
 
Reddit—Jokes
Posted by u/emanon1 February 3, 2015
Auto-correct walks into a bar…
And the batman says, ‘why the log fence?’
         
Twitter
Bruce Marinello
@b42c6522c281475
Autocorrect walks into a bar. And the batman says, “Why the log fence?”
4:55 PM · Feb 5, 2015·Twitter for Android
 
Twitter
🎗 MOGGY 🎗
@DavidMoggy
Auto-correct walks into a bar.
And the batman says: “Why the log fence?”
2:08 PM · Feb 19, 2015 from Poole, England·Twitter for Android
   
Twitter
Groovyhoovy
@Groovyhoovy
Auto-correct walks into a bar. The bartender says, “Why the log fence?”
5:28 AM · May 22, 2018 from Roselle, IL·Twitter for iPhone
 
Twitter
Groovyhoovy
@Groovyhoovy
Auto-correct walks into a bar.
The bartender says, “Why the log fence?”
1:19 PM · May 22, 2020·Twitter Web App
 
Reddit—Cleanjokes
Posted by u/kickypie May 8, 2021
Auto-correct walks into a bar…
And the batman says, ‘why the log fence?’