If you don't bother checking the link that thomasmnile posted check these steps in order..
1 Chalk the trailer wheels (both sides and one chalk in front and one chalk behind).
2 Release and remove WD bars
3 Release hitch lock
4 Drop tongue jack and start lifting the tongue.
5 Depending on slope you may need to backup slightly or pull forward slightly to allow the hitch ball to center in the hitch.
6 once the ball is no longer touching the front or back of hitch you should now be able to continue raising the tongue and the ball will drop out of the hitch with ease.
7 Pull vehicle forward then lower hitch until level.
Following the steps above, I rarely ever have any issues getting the ball out of the hitch..
The trick is to relieve any binding that may be happening and the only way that is possible is to allow some slack between the ball and hitch.
If that fails, then try lifting the tongue ever so slightly, only enough to take the tongue weight off the vehicle..
Then pull out the hitch pin from the receiver, if you cannot pull the hitch pin out, you ARE binding the ball in the tongue (making darn sure the chalks are in place, WD disconnected and the hitch ball lock has been unlocked).
IF you cannot pull out the hitch pin you need to allow the vehicle to move slightly forward or reverse.
Once you have some slack then pull the vehicle forward enough to allow the hitch to pull out of the receiver.. I would bet the moment the hitch falls out of the receiver it WILL hit the ground all by its' self..
