That's understandable considering that the back axle of each car is mounted on a roll pivot specifically to allow it to rock back and forth so that the car can navigate banked track. Have a look at http://capital2.capital.edu/admin-staff/dalthoff/bobsled.html to see the patent on which the Magnum cars are based.
--Dave Althoff, Jr.
*** This post was edited by RideMan on 6/26/2000. ***