When a passenger aboard a Qantas flight en route to Port Moresby, Papua New  Guinea, pointed out that a snake was slithering on the wing, she got the same  reaction William Shatner did after he spotted a gremlin on his plane in the  Twilight Zone: Mostly scoffing and disbelief.

But there was no ambiguity here: A 10-foot scrub python was indeed coiling  for dear life on  the plane's exterior.