tutorial :
mostly follow the video but well , mount on top of any of the rocks by the van , look up on top of the van , back double mount and take cover on the same rock , ull get teleported outside the map are by the rails and get rdy to die lol . have fun !!

found by xfinalkillax and me

http://www.youtube.com/watch?v=BOIqEDdSRWY