Evan sent this story through Beth:
Evan's patrol was investigating an area after an explosion and came upon a small barn-- more like a shed. Inside was a cow; a very disturbed cow, and who could blame her? A bomb had just gone off. She became more agitated, as Evan and a buddy looked around to see if any dangerous stuff was hidden under the dirt.
The cow suddenly became aggressive, and the soldiers thought it might be better to retreat a little. A staff sergeant, seeing them back out of the barn shouted,
"Hey you guys, it's a cow, not a lion!"
At that very moment the enraged cow leapt over its pen and charged the staff sergeant. He turned and ran up the outside stairs of a nearby house. The angry cow stood below, trapping the hapless sergeant on the roof.
Fortunately, one of the soldiers had a camera and photographed the standoff. Unfortunately, for the sergeant, they were duplicated back at the base and posted in several obvious places with the caption "It's a cow, not a lion!"