How can I do a elastic / fluid / glue effect AE?

Hello,
As far as I know it as been made inside after effect, lots of hand keyframing, text turned into shapes, custom shapes animated frame by frame and nice curves for velocity....
No magic, just time.
I suggest you download the clip and watch it frame by frame.
I guess after a few time you can imagine (i did ) that the author started by the end with the title and deformed it backwards...in order to match with the square shape, then added shape layer on path, and so on.