Name that film!
 

Right, this is a bit of a long shot, but does anyone remember a sci-fi film which involved a 'monster' in a lake, which in the end turned out to be just a digger moving up and down in the water!?

I seem to remember it being scary at the time, but i was probably about 5, so its quite old.

Anyone have any idea what im talking about??

It was called the go kids i think, was an Australian film

Had a look on the internet movie data base, thre film has also been called The Quest, and Frog Dreaming.