Someone stated that Mike Webber had an effect in his Lifesavers books where he made spactators' chewing gum switch places.

I have the book but I saw nothing in there like that... unless those pages were stuck together... with gum

Has anyone heard of this? Sounds like fun.

Frank,
I don't know of a Michael Webber chewing gum transposition. But I just thought I would mention that I did see Tom Mullica do an effect with chewing gum on his video from Steven's Magic Emporium, vol. 19.
He called the effect Gozinta Boxes and Gum.
At one point in the effect he stretched the chewed gum between both hands, and showed it to have changed into one of those long balloon animal balloons. And then proceeded to blow it up and attempted to make a balloon sculpture.
This may not be of any help, but just thought I would mention it.

Steve

I've learned that it was Michael Webber but he has not tipped the method.

the color and flavor switch places, evidently.