Hello Alied Modders, Its DareDevil here again...

Lets say that those grass hills are 90 degrees inclined.
Now what i want to do is that if player go standing here in grass hills
I do tracehull get planenormal and somehow calculate output of planenormal to angles and check
if the ground is inclined more than 90 or -90 degrees.
( if it is i just calculate angle to velocity and push player away from there, down... thats the part what i can do )
I dont understand those vector what planenormal give me, can someone translate them for me?
And as always, Thanks!