I would agree with most of what has been said (especially the vodka enduced late night mystery
) I think as it's not even well documented in the wild as to what triggers the events, we are far from understanding how to replicate this in captivity.
Here is an interesting article from 2003 on an event being captured in flow-through seawater tanks at the National Marine Science Centre
http://www.abc.net.au/science/news/stories/s1000860.htm
I may be completely wrong, but I don't think much headway has been made in a semi-captive environment since.