Blow Away
The image is split into tiles that get "blown away" revealing the image beneath.

Effect
Select "Blow Away"
Direction
The direction of the effect. It can be "up", "down", "left" or "right".
Columns & Rows
How to split the image into tiles. The more tiles, the slower it will run.
Max Delay
How much of the duration is used before all the tiles are are moving