SA...airspeed crosscheck read out...altitude crosscheck and readout...radio comms...command ejection capability.
Basically every amanuever has a preset a/s and alt it starts and or finishes at and has certian parameters it has to meet mid-event. The NFO hawks all that to backup the pilot in the event one is not met. At which point he calls for a bailout (means abort of the manuever) and fly away to reset for the next event or knock it off.
Ever see a manuever at an airshow that di not look 100% complete. That is most likely what happened.
Hope this helps...