Some people may be thinking that it'll still somehow interpose us, or trigger a counterattack program. And TBH: the image of Servants being these immovable, invincible demigods that can only be countered by other Servants is from spinoff material. In Fate proper?
Saber gets her ass beat up and down the street. Archer's a bit of a pushover. And even Medea is easy to kill outside her ranged attacks. Unless a Servant is an utterly inhuman monster like Hercules, Spartacus, Gorgon, or has some durability as part of their stats, they can be hurt like you and me. They're faster than bullets, but not inherently bulletproof.