“A guy walks into a bar…”  is a typical form of what has been called the “bar joke.”  A Sahara desert version is:
 
“The Sahara desert walks into a bar. The barman says, ‘Long time, no sea.’”
 
The joke was posted on Twitter on February 28, 2014.
 
     
Twitter
Fuzzy felt eyebrows
‏@TheRealNickKay
The Sahara desert walks into a bar.
The barman says “long time no sea.”
7:54 AM - 28 Feb 2014
 
Twitter
Paul Cramp
‏@AmbGardServ
The Sahara desert walks into a bar.
The barman says “long time no sea.”
#badjokefriday
8:48 AM - 28 Feb 2014
 
Twitter
Edd Mcfc Higham™
‏@edwardhigham
The Sahara desert walks into a bar.
The barman says “long time no sea.”
8:50 AM - 28 Feb 2014
 
Eastern Anglers
Steely
03-01-2014, 05:41 AM
The Sahara desert walks into a bar. The barman says…...“Long time no sea”
 
Facebook
Dad phrases and jokes
September 23, 2015 ·
the Sahara Desert walks into a bar and the bartender says “Long time no sea.” Sorry that’s a very dry one.
 
Google Groups: alt.zen
Zen jokes
pi
12/5/15
(...)
The Sahara desert walks into a bar.
The barman says “Long time no sea.” ;D
 
reddit
The Sahara desert walks into a bar.
submitted August 28, 2016 by BookerGinger
The barman says “long time no sea.”