Has anyone else had the following occur on their S3?

On occassions, I have unlocked my device and noticed that some apps have opened themself without any intervention by me. For me it has been Google Earth, Messaging, Phone and a blank internet page.

I cant seem to pinpoint the exact reason for this but it certainly is rather strange as it seems to happen a few times per day and it is always the same apps. On my lock screen I have Phone, Messaging, Chaton and Camera shortcuts but it is not necessarily these that are opening accidently in my pocket.....and it even happens if the phone is sitting on my desk with nothing touching the screen.....

Any help is most welcome....