Science has gone very wrong if you're deliberately causing a resonance cascade (#94953)

## About The Pull Request

Allows admins to trigger a resonance cascades. It's in the secrets menu,
and it will probably get you de-adminned.
## Why It's Good For The Game
Funny

https://dlc2.portal2sounds.com/sounds/sound_dlc2/vo/cavejohnson/dlc2_0780_altcave_blappeture_mesa01.mp3?id=48
## Changelog
🆑
admin: Someone gave Centcom permission to access the anomalous materials
research department. The result surely can't be good...
/🆑

Co-authored-by: Josh Powell <josh.powell@softwire.com>

code/modules/admin/verbs/secrets.dm

@@ -687,6 +687,20 @@ ADMIN_VERB(secrets, R_NONE, "Secrets", "Abuse harder than you ever have before w
 			message_admins("[key_name_admin(holder)] healed everyone.")
 			log_admin("[key_name(holder)] healed everyone.")
 
+		if("cascade")
+			if(!is_funmin)
+				return
+			message_admins("[key_name_admin(holder)] started a resonance cascade! You're supposed to be a scientist! Use your common sense!")
+			for(var/obj/machinery/power/supermatter_crystal/S in SSmachines.get_machines_by_type_and_subtypes(/obj/machinery/power/supermatter_crystal))
+				if(!S.is_main_engine)
+					continue
+				S.explosion_point = 0
+				S.set_delam(SM_DELAM_PRIO_IN_GAME, /datum/sm_delam/cascade)
+				S.external_damage_immediate += 200
+				S.count_down()
+				return
+			return
+
 	if(holder)
 		log_admin("[key_name(holder)] used secret: [action].")
 #undef THUNDERDOME_TEMPLATE_FILE