ITS a tank
prop_physics_create props_junk/propane_tank001a.mdl prop_physics_create props_junk/propane_tank001a.mdl ent_create npc_satchel ent_fire npc_satchel explode;ent_create prop_combine_ball ent_fire prop_combine_ball explode
Tank for hl2dm copy that code and save it as a cfg

