My Erik Cantrell is a Goofball. He's never once thrown a firecracker into the toilet. Will he prank it? yeah and so will his sister-in-law. They basically throw something in that causes the water to turn pink and the next unfortunate Sim to use said toilet gets all wet. I actually think the firecracker would be funnier, myself.
The previous game save he was quick to prank the Dorm toilets. You should have seen the look on his girlfriend's face when she ended up being the one pranked. She so knows him. LOL "When are you going to grow up!"
I can see the headlines now: 'Global Superstar pranks toilet in Dorm, Girlfriend caught in the Crossfire'