Creating a Zoom Effect

 

First choose the marquee tool

 select the area you want to be the focus of the zoom effect you are  creating you also need to feather the image using the feather tool

go to select inverse this will make the selection the area around the circle

 then go to blur>radial blur

select zoom this is so it looks like a zoom effect if you wanted to choose spin that would spin the image and create a more dizzy effect

this is the final result