Spot the difference between these two images

Spot the difference between these two images is a screamer video uploaded to YouTube made by Zakawat liaqat.

Video
The video starts to asks the viewer to find the differences between two pictures of volcanoes.

The song (but originally played it was the a-ha - Take On Me, since this video had grewed up the internet worldwide) but also in the background. after at 30 seconds mark, it didn't find the differences happen. but at 0:35, a face from What's Wrong? pops up along with a loud screech. but after that, What's Wrong? pops up again along with a yet another loud screech.

Link
NOTE : The following video contains a screamer!
 * youtube.com/watch?v=8zBsS4r_bHs