Hold one second=backup
You backup the automatic feature. The RAT should be deployed automatically when the Dual Engine Failure is recognized by the system. In case that fails as well you push and hold the button for one second firmly. The system opens the cover on the right sight of the fuselage and the RAT "freefalls" into the wind and the windmilling starts to supply AC Power and Hydraulic so you have enough time to glide the Bird thru the skies and restart one - or better - both engines again. The simple flameout should not happen but who knows ? I am sure I have my heart beating faster then ever on the treatmill in that moment. Did a lot of Pacific crossings East-West, North-South and vice versa, just imagine.