So after Chief goes into the jungly part of wherever he is he looks up and sees the ball and all those banshees and phantoms. If I were at that part I would probably run that same direction and kill myself on accident. I don’t know if there is a barrier there or if 343 will just let you run off but I hope that there is more clear directions throughout the game 
(Nav/waypoints show up faster/sooner)
Lol I would do the same. I guess we just have to listen to what Cortana is saying.