You can find various versions of these scripts on community repositories and showcase sites:
: Only download scripts from trusted sources like GitHub or well-known community hubs; "Script Links" from untrusted sites can sometimes lead to malicious downloads. joshclark756-s-scripts/hat fling.lua at main - GitHub fe hat pusher script link
FE (Filtering Enabled) is a Roblox security feature that prevents client-side changes from replicating to the server. However, because avatar accessories (hats) are technically part of the player's character, certain scripts can still manipulate their position and physics in a way that is visible to everyone. The "Pusher" or "Flinger" variant specifically: You can find various versions of these scripts