For your Halloween pleasure…the 1981 B-flick (as in “bad”) Zombie Lake. A review from badmovies.org helps us set the stage:

A single female wanders through an idyllic copse sheltering a secluded gazebo, wherein she gets into her birthday suit and heads for the water. Before you can swallow that first fist full of popcorn, Ms. Skinny Dipper is getting dragged to her doom by a zombie wearing a costume patterned after the regular army uniform of either the Wehrmacht or Panzergrenadiers. Let me repeat that: An innocent nubile young woman is attacked by an Aqua Nazi Zombie while skinny dipping, in broad daylight, in a country lake.