1. Make the toilet slosh water all by itself.
2. Make the toilet do it again.
3. Get her to open the lid
4. Profit:

[LuAnn] Crim was in the bathroom at her home in Perrinton, north of St. Johns. She had just combed her hair, applied a dab of lipstick and was adding a little eye makeup, when the water in a nearby toilet sloshed ... "I looked in there," Crim wrote, "just as a very wet, bedraggled, dark-colored ANIMAL swam up out of the toilet trap and scrambled to get out."

Via Silflay.