Trying my hand at science mystery after a long time. It didn't work for some in its first cryptic version (posted earlier on another portal) so I have tweaked it a little. Does it work for you in its much simpler form?
Placing the cup on the ledge he peered from behind the misty window panes. The lone bulb had already conked off drowning the deserted street into pitch darkness. A steady rain lashed the porch, adding to the pervasive eeriness.
Crouching under his favorite hideout-the bench on the kerb-and merrily cooing to himself. As the old man hobbled outside to feed him it stopped pouring, rather miraculously, only around him as if someone was holding a huge umbrella over him.
He felt someone crawl on his shoulders. And then that familiar coooo...!
The downpour continued unabated as the old man collapsed on the bench.
The cooo reverberated through the desolate kerb.