Text Effect?

This has been perplexing me for a while and I have tinkered with Photoshop but I can't seem to recreate an effect like the text animation on the two above examples by gettingdrastic I'm not looking for an exact way to replicate that effect but just an idea of what particular facets of photoshop I should be using to be able to get text to glide in and out so seamlessly.

I use Photoshop CS and Imageready, although I'm not profiscient in either,[I use animation shop mainly with photoshop] so a simplistic explanation or tutorial would be greatly appriechiated. but all help is wonderful.

EDIT - Solved with thanks to episkeyy & widgetchick