From the movie Jak se budí princezny (How to wake up princesses).

Scene from the 1996 TV series Glass Virgin where a woman steps into a pond and her dress billows up as a result.

From the 1968 movie Great Catherine where her dress billows up after she steps into some water.

I have a fetish for dresses that billow up and inflate in water due to the air trapped inside of them. This is a compilation of various clips showing just that. I know this is really weird, but this is what I'm interested in so eh.

From the end of Tarzan (1999) where Jane jumps into some water and the dress she's wearing ends up billowing up to a ludicrous size.