No, it wasn't a good idea. Jeeves had to hold back on the urge to grab her to keep her from tumbling off. She seem much more sure-footed than him, so he simply tried to maintain as dignified a mount as he could upon the dream eater's back.

When they stopped - however briefly - in front of Sugarcube Corner, Jeeves sprang off Lord Tubbington's back and landed with as much grace he reasonably could on the pathway. "I would be most interested in a more thorough examination of the inside of the establishment, Ms. Pie." Because that meant he wasn't atop that creature. "I am fond of baked goods."