The go around is normaly initiated by the pilot pressing the TOGA switches and rotating the aircraft into the climb. The go around is normaly flown by the pilot but on occasion it can be flown by the aircraft depending on the autopilot set up but even in this case the aircraft doesnt make the decision its the pilots.
You lucky, lucky sod. In my aircraft (not saying what but it is almost 40yrs old) when the Capt. decides to go around, I guard the throttles to make sure he doesn't overtorque the engines. Simultaneously I'm bringing the flaps up to T/O whilst raising the gear and landing lights with my third and fourth hands. The Eng just calls out the Torques and the Nav shouts out the MAP.
It can get a bit busy.....
