How to get out of High ground

In order to get out of the level boundry you must spawn a wraith and have some one get into it. Then have another person get into a mongoose have the person in the mongoose to drive towards the the barrier until he can no longer go any further than have the wraith get behind him. Now the wraith needs to boost and the person in the mongoose needs to get out of it and you should be on the other side of high ground! This trick works on every level that has a sea.