A mate leant me a book years ago called 'RECCONDO. LRRPs of the 101st Airborne.' by Larry Chambers. ISBN 0-8041-0843-9
There is a bit in that where they run into what they presumed was a tiger one night in the bush. (they didn't see it, just heard it and the screams of their scout as he was killed by it)
On the same patrol, their radioman was struck by lightning.
One hell of a walk in the bush, one that I bet none of the participants will ever forget.
I was reading another book at the same time, about roughly the same thing (long range recon patrols in Vietnam) and it may have been in that, not reccondo, unfortunately I cannot remember the title or author of the second book.