Originally Posted by BrianShaw
Don't know what is best, but here are a couple of other options that come to mind:
Pull it out of the cassette and wind it back in. (Do it fast so it isn't totally fogged).
Send through a checked luggage scanner at the airport.
Feed it to your dog (or pet goat, if you have one) and use it after you retrieve it.
Or just buy some expired film on ebay.