I was kinda hoping you would know... I just know it's labeled in the gallery as 'She trips and falls flat on the floor.' and it's the one with the fish crawling into her swimsuit. Anyway, I got the Floodway scene, though I thought I already tried what you suggested. The only difference I can think of is I was still on "land" before entering the pod.
Although now that I'm looking closer at the gallery, I'm finding a bunch of seemingly redundant images.
Well anyway, another thing I was wondering if some scenes are only supposed to be viewable once? I was trying to get the 'She overheats!' scene in the Hidden Prison level because I wanted to see what she says if I had answered Y instead of N like I had originally, but I can't recreate it. She heats up from the pheromones but then it just disappears without her having to do anything.