4, 6, 6, 0, 3, 2, 0, 1, 2, ?
How does it end? And why?
The "?" stands for a number. Which one?
And of course the interesting part is: What's the rule behind this specific countdown?
Hint 1 (about the title):
While the correct answer was already given, there is this T-yosc bit of the title. As per request, here is a hint specifically about that:
a very typical countdown
Hint 2 (if Hint 1 is not enough):
...that tells you how far I turned the real hint
Hint 3 (if Hint 2 is not enough):