It makes zero sense for the structural loads to go up when the load is dropped. The angle of attack will momentarily be the same, lift will be the same, and the aircraft will rise. As you get more vertical speed the relative wind effectively reduces angle of attack and also you have less weight.
Newton's second law of motion applies
Force = mass x acceleration
Force exerted by elevator is the same throughout manoeuver
Mass reduces on drop
Therefore acceleration (i.e. g-load) must increase for same force
I never realised the implication for aerial application: I have learned from this poor chap's accident.