Or a paparazzo who he mistook for zombies. Either way the story is pretty amusing. Per CNN:

Woody Harrelson defended his clash with a photographer at a New York airport Wednesday night as a case of mistaken identity — he says he mistook the cameraman for a zombie.

Woody Harrelson says he got into a clash with a photographer because he mistook him for a zombie…

“I wrapped a movie called ‘Zombieland,’ in which I was constantly under assault by zombies, then flew to New York, still very much in character,” Harrelson said in a statement issued Friday by his publicist.

“With my daughter at the airport I was startled by a paparazzo, who I quite understandably mistook for a zombie,” he said.

You can read more at CNN.com and you can watch the video at TMZ, but we feel safe in saying Woody’s quote is the story. Very similar to the excuse we use on the female teller when she rejects our advances. “Sorry, we just got done shooting a porno and were still in character.”

[CNN via Film Drunk]