Yo Shackman,
I have heard that story too. Shack cruising along minding its own business, P-51 with Indo markings appears on the wing, big questionmark bubble appears over the Shack until Captain tells the W/O to let HQ know, Javelin scrambles and appears on the scene, P-51 departs, Shack crew resume their eating and sleeping routine, Javelin goes home, lots of beer and war stories in the Tengah Officer's Mess. True? I would love to know.