Here’s a cinematic sighting of the liquid girl trope in an unusual place, with Audrey Tautou doing the fluidic turn in the beyond-charming Le Fabuleux Destin d’Amélie Poulain (2001). And it’s sure worth burning up the bandwidth with an animated gif.
Amélie, played by Tautou, is reacting to romantic disappointment if I remember correctly, so not exactly mad science. So does it belong here? Are you kidding? I would watch an infomercial for toilet brushes if it had Audrey Tautou in it and let’s face it, so would you.