Swallow Whole, low stomach damage, high fly speed?
Hmmm... this one is intriguing, but said creature would likely get eviscerated by some of the party members. The character I would have needed it against this week is the Fighter//Rogue, however, so he would have stabbed his way out in short order.
Perhaps with a paralytic poison in the stomach...
"You were swallowed by a dragon."
*stab*
"You hit his gallbladder... role to save vs Dragon Bile poison."
It's not perfect (wouldn't work vs the Druid), but it's not too terrible. It would actually work quite well in the story line very shortly.
Many of the suggested quantum quirks and deity interventions, while amusing, don't fit the tone of my game. Thanks for the suggestions though.
I just thought of another one: Rogue* Thommil engulfs the person, and then earthglides with said individual to a sealed off underground cave, where he lets the individual go. Won't work for a Mage with teleport, but most other characters would have to wait to be saved, or wait to reprep spells (master earth, etc).
*not the class, just the idea of uncontrolled, or unpredictable.