"Very Loud Noises" and "Meaty Splatters" are nicknames for your support NPCs, Archie and Urby respectively.
Monster Urby 🇬🇧 Level Designer
The Core's pre-disaster maps will set up dozens of little stories; Every window and door you pass will offer a bite size chunk of life in Black Mesa.
A few hours later, when you return, you will end each and every one of those stories with some variation of very loud noises and meaty splatters.