Also to be honest , he's scared shitless , he just ran through a herd of walkers. I mean I doubt he's thinking at this stage ...let me shoot this guy in front of me who just appeared outta nowhere. And its gonna be an interesting deal as now Negan and him from what is claimed , have to work together to escape this. This world creates strange alliances.
Sound possibly. They want the walker herd there so create as much sound as possible to travel.