Mummy Returns, The - Amazing Disappearing... Foam
When O'Connell's house is invaded, he locates his brother Jonathan hiding in a bathtub with bubble bath. He steps out with foam on his clothes. They escape by jumping out a window into some bushes. When we see them next (a second, about, after jumping), Jonathan has no foam whatsoever on his clothes, and none is visible in the bushes. It's plausible that SOME may have rubbed off, but all of it? When it was all over?