Give'em hell
Imagine a scary sound of whiplash, along with a sonic boom, which brought inconvenience and disturbed one's vision. The air traced by the bullet brushed hard on the face of one being shot at.
Multiply the situation by ten or hundreds and get the result—Aegis's turret gunners' automatic firing mode, exhibited numerous times the prior effect. That was what the gangs who were being massacred were feeling at the moment.
Those who survived tried to find cover and concealment after experiencing the hell-like scenes.
Of course, there were also brave souls who managed to fire back with their small weapons and some bullets were very close to the gunners above the two Aegis vehicles.
Tang Ziyi's comrades had no trouble of being psychologically suppressed under fire, especially when the vehicles provided ample protection.