Are you a friendly bear?

On a military training exercise, the British divisional command 
radio operators were getting very bored one quiet night, when 
breaking the silence a voice asked over the air... "Are there any 
friendly bears listening?"
  After a moment, another voice replied... "Yes, I'm a friendly bear,"
and then another voice... "I'm a friendly bear too!"
  At this point, the Officer at Headquarters grabbed his microphone 
and let loose a blistering tirade at the operators for fooling around 
on a radio link. When he had finished, there was silence for about 
ten seconds.


  Then a small voice said, "You're not a very friendly bear, are you?"

Any of you remember this happening?  I do it never went down very well with the brass!