Algodoo

space ship that decompressurizes, water is air here(instructions: open inside door first, collision a and collide with water off, then turn back on once human is in the little place, then remove collides with water from decompressurize/drain tab until all water is gone from the small place, then finally you can open the outer door, you can open the outer door with the water still inside if you want idc)
yeah this is just how i think space ships let astronauts out