Mad Hatter's trademark dance that was not only one of the most embarrassing and unnecessarily awkward moments in the history of cinema, but also the moment when Tim Burton's credibility as a director hit an all time low.
On that note, the actual man performing the dance, David "Elsewhere" Bernal, is actually a very talented and innovative dancer and is a treat to watch within the appropriate context.
When some resigns or retires from a job, they are on "eternity leave". This can also refer to someone who has passed away, especially someone who worked somewhere for a long time, retired/resigned, then passed away later.
Oh I'm sorry, you didn't know that Kelly is on eternity leave? She resigned and moved to Hawaii!
With regrets I would like to inform you that my boss is officially on eternity leave. I will never see or hear them again. Ever.