Sounds like something that comes when you least expect it.
It sounds like the system does not obey.
A provoking and perhaps even exasperating little sound.
And it disappeared as if it never existed.
Sorry mate but I don't buy it.
Appeared out of nowhere, vanished in haste.
A notification sound that has a ligneous quality to it.
As they say, "keep the flame of curiosity and wonderment alive".
The preface of a really important event.