The Final Countdown

In my previous job once it came to about 4.55pm or so (we finished at 5 there) someone in our room would start it off.

Di-na-ni-ni.

Then a voice could be heard from the room across the hall.

Di na-ni-ni-ni.

And so on and so forth until everyone on our floor was screaming and singing at the top of their lungs to "Final Countdown". I'm alone in my office now with no-one else on my floor.

Help me out guys...

Di-na-ni-ni....