[spoiler]I told you, you choose how much it slows her down, that's the effect. The propulsion pack is self stabilizing because realistically, it would not make sense to manufacture something that can send someone flying long distances of they can easily be knocked out of control. Now, shockwaves are not an unstoppable force. If an explosion goes off and the shockwave hits the side of a mountain or something, it will bounce back off. Now, Sapphire isn't immovable, no, but these are small explosives versus a heavy object moving the opposite direction. Someone could easily bat her out of the air with a tree, but these are hitting her head-on and and again, her propulsion pack is stabilized to keep her moving in one direction... If you really can't find a way to continue this then I guess I'll change it, but this isn't something that should really be a huge deal.[/spoiler]