Help:Troubleshooting/Map Issues/FOF/Bouncy FOF
There are two things you must do to stop your Bouncy FOF from bouncing forever. First of all, the control linedef must be less than 96 fracunits in length; the length is what determines the bounce strength. Also, you must set the Bouncy Wall linedef flag on the control linedef; otherwise, the sector will bounce you forever regardless of the linedef length.