Well, not sure what timer are you talking about. If it is about the explosion that a ghost creates when it expires, it is implemented into "finfantasma.sqs" and it is not dangerous for the player. If you mean the effect of being close to a ghost and then being sent into the air, this is implemented into "susto.sqs" just after the line containing [_pos]exec"mando_ghosts\explosion.sqs"