Garrys mod spartian kick

Hi i downloaded the spartian kick mod for garrys mod and im having problems with it. the mod is in the game and every thing but when i try to kick an npc i kick 3 TIMES!?! and Not In slow motion!?! but the third time my character brings up his knee it sudenly turns into slow motion and kills the npc in front of me. If you know of anything that may help me please comment

Thats the way it should be, like the movie. Its shows it, then an instant replay, then a slow motion replay. I dont have it but im just assuming.

No ive seen legit video on youtube it should be a single kick.