The early Michael Jackson clips when morphing and digital editing was still in its infancy are also still really cool to look at (particularly "Black & White")
They may seem really dated and cheesy now, but in their day, it was pretty cutting edge stuff.
Goodshirt Sophie: https://www.youtube.com/watch?v=ePo9G-Rzr9k&list=PLCFB19EC4B...
Goodshirt Blowing Dirt: https://www.youtube.com/watch?v=JzLBfBtknxk&index=8&list=PLC...
It's a really cool effect -- except for a few bits where objects fall upwards and the like, there's nothing too strikingly "off" about the motion in the video, but you can tell that something's up. It doesn't form an uncanny valley, though -- there's still an overarching "organic" feeling to the thing.
mildly nsfw - https://www.youtube.com/watch?v=apZlp-ZKe9g