Greased!

On cast: Reflex DC13
Ending turn in grease: Reflex DC13
Moving through:
1. DC10 balance check to move half distance
2. Success, but less than 5 ranks in balance?
2.1 Flat footed (lose Dex to AC)
2.2 DC 10 balance check when hit
3. Fail > 5: Fall down
4. Fail