I am constantly surprised at the things that are produced from decay in our garden. The fungi especially. We reluctantly cut down a plum tree because it had self seeded too close to an earlier plum and was getting tangled and blocking light from the main tree. Our cats sit in this area of the garden on a pile of bricks which gives them a great view into the compost area (their ears can be seen wiggling at the slightest mousey noise being emitted from the the debris).
This morning, retrieving kindling from the wood shed, I spotted this, which has grown from the rotting plum stump
Oh the delights of nature's creative box of tricks!