𝒉𝒆𝒂𝒅𝒔𝒉𝒐𝒕 𝒐𝒏𝒍𝒚 𝒛𝒆𝒓𝒔𝒕ö𝒓𝒆𝒓

Anti-aim flips the hitboxes. Your head is at your feet and your feet are at your head. If a bullet hits you in the feet, you'll be hit in the head.