Well, first to do this you need:
A dummy with the camera attached to it
A small object
'While <something> is true' events
The knowledge of functions
First, set the camera vehicle to your dummy (must be placed at camera first).
Then set the movement to the dummy
Change the left/right turning to the dummy
Now you cant walk through the floor.
Place an object the siz of the Alice 'beachchair'. Then place a 'While something is true' event. Then put in "dummy is within threshold of <object>"
Then in begin place "camera move 1 meter away from <object>" and in end place "If camera is 10 meters away from ground, Do- camera move to dummy"