Your recent flight experience is one of the biggest problems the newer pilots have the most trouble with. which is recognizing when your airplane is in a stall. Any time you bank an airplane the speed at which it will stall goes up due to the lose of lift(horizontal component of lift) when an airplane is banked in a 60 degree bank the rated stall speed doubles the plane actually flies as if it has doubled in weight because of the lose of the horizontal component of lift. Dropping the power in the turn to base is what induced the stall you experienced, then being exited and holding full up caused the secondary stalling you experienced. You are very lucky there was someone talented enough to grab your transmitter and save your plane.I would take that man out for lunch LOL!!! Trimming your plane with down elevator trim will not help with this type condition. Try to remember any time you are in a steep bank to keep the power up and carry some extra speed to keep you out of a stalling condition. I hope this helps
jerrysu29 Call Sign Wild Man