I think the thing that would get my attention if the reverser deployed would be the light that says reverser unlocked and rev ready
they are in front of your face, and if you can see the airspeed or horizon you would see these
the stall warning is a huge sign saying "stall", a profound HORN and a stick shaker, though no pusher. it can scare the hell out of you.
does anyone know if the plane pushed back or did a power back (reversed)?