How do you beat level 2 on causality

There are 5 victims to kill.

1) First kill the guy in the sewer : click on the head of the guy on the toilet twice. This makes him poo. Click the guy in the sewer's helmet so it falls off. Click to flush the toilet. He dies when he falls on his hammer.
2) To kill the guy on the roof, the guy outside the toilet and the guy on the toilet : click the two cracks on the roof inside the toilet, and click to move the bottom brick under the takeoff board. When the guy on the roof runs, he falls short and falls on a spike. The guy on the ground gets hit by the brick and the roof collapses on the guy on the toilet.
3) To kill the guy on the bench, click his sandwich and he drops it and stands up. Then a hang glider flies overhead. Click on the glider and it will crash into the guy below, killing both.
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On this level, you will have to move a little fast.

• Click on the stickman in the sewer, and hit helmet will fall off. Then, click on the stickmans head on the toilet a few time (it flashes red), and he will defecate. Click on the handle of the toilet (or the tank above the stickman) and it will cause the toilet to flush. The stickman in the sewer will notice the feces and jump, hitting his head on the edge of the sewer entrance, and killing himself.
• Next, click on the small cracks on the top of the roof of the bathroom that the stickman is in. Then, move the brick on the bottom of the plank, causing it to slide to the left a little. When the stickman tries to run, he'll slip and stab himself in the chest with the spike, and the brick will hit the stickman who is waiting, and kill him. The roof will hit the stickman who is on the toilet, and he will die.
• Lastly, click the sandwich of the stickman who is sitting down. When it falls out of his hand, he will get up and look at the sky. A few seconds later, a stickman on a hang glider will fly out of no where. Click on him a bunch of times, and he will fall to his death on the other stickman, and they will both die.