In 1:14 if you shoot missile from a long distance to the NPC next to the car, the other NPC (standing next to the Arena) won't notice you and he still has vision 1:18, if you look at your mini-map, you can see his vision. So he will not shoot you and you don't need to waste time to kill him anymore. And also when you enter Sasquatch car, that NPC will lose his vision but still he doesn't notice you. The only way that he starts shooting you: If you go to him or if you start shooting near him