Mortars can make the game crash.
 

The title says it all. I did fun changes to Radio Aidid WAC that makes mortar strike around the area if a player found a secret intel on the car. Exiting to main/campaign menu during that makes the game crash with sysdump

Ammo variants than ammo_AI_MORTAR like ammo_grenadesm can cause the crash too if the player tries to save during after smoke grenades are spawned automatically.