If you like this punchline, go watch the movie "The Ballad of Leslie Vernon"
It's a mockumentary about a supernatural serial killer a la michael myers or jason vorhees. One of my favorite lines is:
Interviewer: What's one of the important things about being a supernatural serial killer that often gets overlooked?
Leslie: Cardio. You have no idea how difficult it is to chase these people while their sprinting, and i have to look like im walking.