Spot the difference between these two images

Spot the difference between these two images is a screamer video uploaded to YouTube by Zakawat liaqat on November 21st, 2011.

The video starts to asks the viewer to find the differences between two pictures of volcanoes, while a song: Take on Me by ah-a plays in the background, after around 35 seconds, at which point a face from What's Wrong? pops up along with a loud screech. then the screamer pops up again along with the same screech.

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