Was reading an article in the new AOPA Pilot about when to declare an emergency. The author (Chip Wright) cited an example when a controller wouldn't give him clearance to make a left turn to avoid an emormous developing column of CB. Right turn would mean overwater several miles out. He threatened to declare an emergency and got the vectors he wanted around the storm from the uncooperative controller, stating that it qualified as an "urgent" situation as there was no way he was going to penetrate that storm.
Anyone ever done anything similar, or had a more "distressful" cause for declaring?

