Make sure to stretch your muscles thoroughly before embarking on your next kill-mission! You don't want to pull a hamstring right before you stab a guy in the hamstring, after all!
[UPDATED... ! NEW AND IMPROVED... !]

Credits:
Tired Swiss - Promos
Lo-fi Longcat - Original concept
Spook - Model
SpookyToad - Rig
RicePrezPip - Texture

Special Thanks to Toad!