Greetings from the New York TRACON!
In ATC, we use the phrase "Break for Control" as a signal that something of
priority must be dealt with. "Break for Emergency" means an emergency situation
is occuring and requires immediate attention. Although this is specifically
listed for use in interrupting radio and interphone communications, it is used
to interrupt and/or garner attention in just about any other situation
imaginable.
Have fun, fly smart, and keep SAFETY first!
Brian J. Fallon
NATCA Safety Representative, NY TRACON
Associate Editor, The NATCA Voice
http://www.natcavoice.org