just as a sidenote ...in my opinion the best judge is not always the one that knows the most about freestyle.
Offcourse its important , but other things are as important.
- concentration : you have to sit still for a long time , it can get boring after sitting on a chair for many hours looking at the same thing over and over again.
- being honest : you cannot let your mates win
- can you handle the pressure : everybody has an opinion about you afterwards, which is usually not a positive one.
- communication : you have to explain why you judged a certain way (in english usually)