Oh yes – he does exist in Final Cut Pro 4 and 5! If you have no idea what I am going on about here, run a few intenet searches for ‘Bruce the Yak’ or ‘Easter Egg in Final Cut Pro’. The guy’s a legend!
I am not going to tell you how to get him in v4 or 5. In an earlier version you have to invoke the tools window and click find a certain spot to control+click in, and ‘Call the Yak’ would appear as an option. Nowadays it’s a tad harder, but suffice to say it isn’t in the tools window – and it isn’t about control+clicking anything.
There could be a custom button for it, though… 
(Many, many thanks to Michael Conniff for pointing the way here.)