When you walk into some props on some maps (like the computers in the front desk on inno motel) a sound plays that I am trying to find the title of. I have heard this same sound on the Eric Andre show and also while watching a movie (The Sandlot) today.
You can download GCFScape here: https://maurits.tv/data/garrysmod/wiki/wiki.garrysmod.com/index72f9.html Once you download it; navigate to C:\Program Files (x86)\Steam\steamapps\common\Counter-Strike Source\hl2 in GCFScape and open hl2_sound_misc_dir.vpk You can right click and click "Extract" on the sounds folder that pops up to save all of the sounds. Here is a total list of sounds you'll find: https://maurits.tv/data/garrysmod/wiki/wiki.garrysmod.com/index8f77.html The sounds you're looking for are either metal_box_break1 or metal_box_break2