Did eagle eyed viewers spot...
When Bridget arrives at the music festival there appeared to be a crusty guy with dreads smiling and staring almost directly at the camera. It looked suspiciously like Patrick Dempsey in disguise a few seconds before he enters as Jack and picks her up out of the mud.
Wouldn't mind knowing if it was him as I'm unlikely to give the film a repeat viewing (it was generally pretty good but a bit erratic and smacked of multiple screenwriters).