You activate it from the lower side.

you must be on it and jump on then click the x button and it pulls you up. its not the zipline like i though the one you hang on its a platform you must stand on and all 4 can stand on it. and must be started from the bottom.

Yeah its not what I expected, and it costs a bomb just for one ride

yh when you open the docter thing theres a power switch outside the hut turn that on t should work.Really expensive :-/

To activate it you have to go to the doctors Quarters and outside the hut is a ramp-like platform, near it is a switch, when you turn it on it takes like literly 3 seconds to get to you and then you have to wait about 3 minutes before you can use it. WHen you can use it it costs 1,500 points.

how much money is it?

one thousand five hundred points !!!!!!!