Alex blocked her saber strike, but she had is back, and at no point was she going to use [i]just[/i] her beam saber, and opened up on the Freedoms back with her shoulder gatlings, mostly the wings and main thruster. Her sudden jerking around didn't agree with Zero though, one of the already damage wings tore it self off while the other just went limp. 

However, even as she back peddled away from Alex and his Freedom, she kept firing on him with the gatlings.