The biggest threat in a zombie setting are characters acting like idiots, or a rube Goldberg machine of unlikely coincidences that could have been avoided. Looking at you walking dead.

I'm just goIng to nab this wine bottle that is somehow supporting this wall, causing a collapse that knocks the ball into the tub which hits the man into the pan sending a helicopter crashing in with a dozen zombies. There's a reason I stopped watching it XD