Depends on the setting and where I hit them. They freeze. Instantly. I can control it pretty well.

[In her defence, Science usually doesn't include holding a gun out of a comic book.]

The trigger's sensitive. Pull it lightly or you'll cause more damage than you want.

[The gun's been fine-tuned by him to only really be usable when you know it as well as he does, but for one shot, he can help her out.]