I was stuck in a traffic jam on J. P. Rizal St in San Mateo on my way home (unfortunately an all too frequent experience) when I noticed this strange looking palm tree in the backyard of a house opposite the SM mall.
I worked out that it must be the trunk of a dead coconut palm that either got decapitated in a typhoon, or died because of a coconut beetle infestation, onto which a bird had dropped a seed (probably a fig tree seed) which had produced a small tree that is now growing out of the top of the trunk.
As a dead coconut trunk is very fibrous and will hold a lot of water in the rainy season, the tree will probably survive a few months more. But once the dryer weather comes towards the end of the year, I doubt it will survive very long. But it will be interesting to see how long it does survive.