Not sure exactly the result your looking for, but try the mirror effect in the perspective category of the effects menu.
Once you have applied the effect double click the clip to load it to the viewer window and click the effects tab to access the settings. Click the "+ within a circle" button for reflective center. this will activate the cross hair on the canvas window. Now click and drag in the canvas window left or right to change the reflective center until you achieve the desired effect. If it seems like the reflective center is going the wrong way, rotate the clock dial for reflective angle to 180 and then play with reflective center again.
The are other more complicated ways of achieving a similar effect by using a duplicate of your clip on the video track above in conjunction with motion tab settings and masks, but I don't have time to write a book.
I should have been more politefull,
However I believe the Cow is a place to get answers to things you cant figure out yourself (amongst others). Not to place a post without bothering to either do a Goggle/Cow search or even a search within Final Cut itself.
[Andreas Karoliussen]"However I believe the Cow is a place to get answers to things you cant figure out yourself (amongst others). Not to place a post without bothering to either do a Goggle/Cow search or even a search within Final Cut itself. "
There are all different levels of users here. Obviously, Greg is just learning FCP so please give him a break. Don't you remember the first time you sat down to an NLE or other new software? The Cow is perfect for someone like Greg. Next time suggest a search instead of jumping on him for not doing one. If you want to be real cool about it, search for him and link to it. If you don't want to go through that trouble and all you want to do is talk down to Greg, don't post. It doesn't help anyone.