Can you...
Do a Freestyle "corkscrew" pattern?
While following the rail, do a 180° turn on the forehand and stop.
Then do a 180° turn on the haunches and stop.
Then a 180° turn on the forehand and stop.
Repeat the turns to move down the rail in a fun, twisty, corkscrew fashion.
Start slowly and work up to doing it in flow with no stop in between.
This can also be done online.