A Hoof

A_Hoof is a code pointer used in the normal animation for the Cyberdemon.

is a wrapper around A_Chase that also plays the sound effect DSHOOF. It allows the normal monster chase AI to run while adding the Cyberdemon's hoof footstep sound as it walks.

Uses
The  code pointer appears in the following states in Doom's state table:

Example
The following is an example of how to set the  code pointer in a Dehacked file:

Pointer 21 (Frame 34) Codep Frame = 676

Or using BEX syntax:

[CODEPTR] Frame 1234 = Hoof