How do i play an animation upon getting hit?

hello, sorry if my english is off-balanced, So i've made a tool that when you click it plays a punching animation through a remote event and have also made a damaging script so that it damages enemies or players. However, i can't seem to find a way so that when you hit someone with it, they react being hit by playing another animation on their side. does anyone have any idea how i can make it so that when someone gets hit they play an animation of getting hit. i've already made the react animation i just need an example of how i can do this.