[maxwell]

Why are they only taking one shot at their victims?

He's challenging himself. Like in a video game.

[Dead Dog]

He's escaping so he can do this again. This isn't a game, it is a war. He/she/they may be having the time of their lives, but the tactic is simply shrewd business. They probably would love to pump a second round in their victim, but they simply don't have the time.