Well I didnt actually see it myself, but I did witness the aftermath. Back in 72 or 73 I was Sargent of the Guard one night. The Spec 4 who was guarding the helicopter pad said one of the things attacked him, causing him to cut it to pieces with his bayonet.
I never did get the full story because the rest of the detachment plus a couple of MPs insisted on beating the hell out of him. If I had known you would ask, I would have written him in Levenworth and inquired.