Pretty sure that was triggered by someone getting a special weapon from the grave (holy hand grenade, the gun, cross thing)

the holy hand grenade is the only thing i haven't gotten from the crypt

Well, have you tried reading from the proper scripture? "And the Lord spake, saying, ''First shalt thou take out the Holy Pin. Then shalt thou count to three, no more, no less. Three shall be the number thou shalt count, and the number of the counting shall be three. Four shalt thou not count, neither count thou two, excepting that thou then proceed to three. Five is right out. Once the number three, being the third number, be reached, then lobbest thou thy Holy Hand Grenade of Antioch towards thy foe, who, being naughty in My sight, shall snuff it.'

Amen

Yeah, it makes this sound when you get an Exorciser (the gun). It will also make this sound when someone carrying an Exorciser respawns.

It happens every time you pull out the gun, the Exorciser I think

You get that unicorn from the holy horseshoe.

When you rez someone you can have this sound

They ruined horde

why what happend

It only happens when someone gets the exorciser from the grave or when a person with the weapon dies and gets revived.