Article 4395 of rec.humor.funny:
Newsgroups: rec.humor.funny
From: lennon@silly.com (Michael Krakovskiy)
Subject: Russian Joke
Date: Mon, 10 Jul 95 19:30:05 EDT

This joke is  probably on of the best which I  ever read
on relcom.humor (Russian  newsgroup). Unfortunately
i do  not  remember the name of the original poster. I took some
freedom  in translating it into English in order to
make it more understandable to English-speaking auditory.  

A line  of Russian soldiers stands in front of a huge
rectangular hole in the ground.
Sergant commands:- "Private Ivanov!"
                 -  "Yes, sir."
                 -  "Stand like this:"

                          O
                         _|______
                        | |
                        | |
                        | |
                         | |
                         | |
                         | |
                         | |
                  -"Jump!!"

The soldier jumps  into  the  hole.
The sergant  commands again:
                     -  "Private  Pyetrov!!"
                     -  "Yes, sir!"
                     -  "Stand like this:"

                       |  
                       |  O
                       \ -|-|
                          | |
                          | |
                          \-\
                           | |
                           | |
                           | |
                       -" Yes, sir!"
                       -" Jump!"

  The soldier jumps and falls into the  hole.
  The sergant commands  again:
                        -" Private Sidorov!!"
                        -" Yes, sir!"
                        _" Stand  like  this:"

                             O
                           |-|-|
                           | | |
                           | | |
                           | | |
                            | |
                            | |
                            | |
                            | |
                        - "Yes,  sir!"
                        - "Jump!"

     At  this point a car with a colonel arrives to  that 
     place.  Colonel, very angry, comes up to the sergant 
     and tells him: "Comrad sergant, how many times do
     I have to tell  you: STOP PLAYING TETRIS WITH  THE 
     SOLDIERS!!!!!!!!!"