You can hear the (new) sound of an explosive being armed when you join a server and an armed explosive is nearby.
**[[ https://youtu.be/rVQTaY58wZc | VIDEO PROOF ]]**
People who log in nearby immediately know that there is an armed explosive somewhere around even tho they cannot see it. This makes it harder to hide armed explosives (i.c.m tripwires) from other people.