Quote Originally Posted by Oslecamo View Post
Perhaps illusions have a life score like everybody else and when it gets destroyed it slowly dissipates.
Or you can stick your hand through an illusion if you say "I disbelieve", or there's a "will save" or "perception test" or something similar and Vinnie made his while Jillian failed hers (quite likely for perception IMAO). Or maybe as you suggested it's that it's "dead" now, or as someone else suggested Jack may have stopped concentrating since it was too late to stop him, or range may matter and Jack was farther away, or something else.

There are plenty of possible reasons for Vinnie to be able to put his hand through the dragon but it to feel solid to Jillian.