Depends on the Dragon. That's all I gotta say.
But never, EVER try to strong arm a dragon. Or think you have the drop on them.
For anyone who's a long time, old school D&D player, espeically Forgotten Realms, you may be familiar with Elminster's set of contingency spells. Basically, a whole host of Protection, Teleportation, Illusion, and other "Get Me The Frag Outta Here" spells all set up with a series of emergency contingencies. I figure Dragons, especially Great Dragons, are much the same way, with a whole pile of high level anchored spells with various emergency triggers.
I know one of my favorites that I've used a few times as a GM is basically my "Hand of God" contingency... Invisibilty combined with a BIG heal spell and an illusion of the dragon dying spectacularly. Always used while he's flying awya, and the PCs have managed to get their hands on rocket launchers or other heavy weaponry. Poor Perianwyr has needed that particular combo more than a few times

Bull