The Flying Zombie

I am making a game, Classic zombie game. In the game you use a Ka-bar not a gun. I am having a problem though. When i hit the zombie (its collision box) It goes flying. How do i stop it from taking flight? any help is appreciated on the highest level.

Raise “Mass” value, maybe?

It is as high as it can go, What else should i try?

Or decrease the mass of your k-bar. For instance, if you hit a 1 lb zombie with a 50 lb k-bar, yes…free flights to all destinations. If you reverse those numbers, your zombie will be on the no-fly list. I basically use lbs as the physics mass, so that I can estimate weights and get them roughly accurate.