The Zone of Reverse Gravity

''There's nothing wrong here...waaaaaaaaaaa....... - unlucky traveller number 287''

Well, the name says it all. For some unknown reason (not as if the reason for anything else is known), this 9001m by 4200m area had its gravity reversed, causing heavy things to float and floating things to, well, crash to the ground. If a traveller is not careful enough to bring enough helium ballons when crossing this large expanse, he could find himself floating into space and eventually suffocating till he is dead. Some 'experts' are wondering as to why the ground itself is not floating up.