May have put too much in the trunk pressing upwards on the lid and thus more friction for the motor to overcome.
whenyourbatteryisdead - mikefocke2 has many hints on what you can do. I know you don't have a dead battery but some of the techniques including fishing for the mechanical hood release cable would be the same. The hood release motor will be a bit stronger if the engine is running at 3500 RPM. But try the press gently on the front edge of the hood while you see if the motor would work.
You'll be slimmer without the ice cream. The beer will keep.