It follows (737) that g/a thrust cannot be applied until the reversers are both stowed
I recall a 737-200 crashed in Canada when landing in a snow storm. The aircraft had just touched down when a snow-plough appeared out of the murk in front of the 737. The pilot had initiated reverse on both engines but quickly cancelled reverse and at the same time lifted the aircraft over the snow-plough. Due to slightly different stow speeds on the actuated reversers and the fact the landing gear oleo extension cut off the hydraulic power to the reversers as the pilot hauled off the deck, one reverser stowed but the other did not. As the aircraft climbed, the throttle closed sharply on the reverser that had not quite shut and the open reverser doors were forced open by increasing airspeed. The pilot broke his thumb when it was trapped by the split throttles and the aircraft banked steeply under asymmetric thrust and an open reverser door and crashed with loss of lives.