I guess it's only fair I kick this off with my own example. To preface, I'm in no way anything more than an amateur, but I really enjoy making videos for fun. Recently, a friend approached me and asked if I would shoot her wedding. All she really wanted was a rolling video of the ceremony, but I told her I'd also make a short edit to include on the DVD as well as the continuous video (shot with another camera). Had her expectations been anything higher than zero, I would have passed, but in this case I ended up having a great time with the project.
This clip contains an "after" and "before" shot, although I didn't end up using this in the video. For editing, I copied the clip onto two overlayed video tracks in Premier Pro. The top video was set to 61.5% opacity. The bottom video has a gaussian blur of +31.8 and contrast of +27.2. Both tracks cross dissolve from a white video placeholder, although the top track takes slightly longer to do so. For the unedited clip, I left the standard cross dissolve from white. Both original and altered clips were interpreted at 23.976fps from the original 59.94fps.
I originally came across this technique on a forum found here: http://bit.ly/ouefDi , as posted by Andy Holland.
Check it out below: