My domain is hung.  How do I panic my domain so I can get a core file for
analysis?      

There are 2 ways to crash a domain so you can get a core file

First, establish a console session using "console -d <domain id>" then
once connected, use the ~# keys to send a reset to the domain.  Once you
are at the ok prompt type "sync".

The other way is to issue a reset -d <domain id> -x