How do you beat level 4 on causality 2

Level 4
There are 6 victims.
Click second stall in restroom to lock it. Click guy in rear of balcony, who goes to concession stand. Click drink cup next to other watcher three times, and he goes to first stall in bathroom. Click cone machine, but click the cone and it falls onto floor. The machine won't make another, so guy returns to balcony. The projectionist goes to smoke, then comes back when you click film reel, which falls on guy under it. Fire kills projectionist, and film crashes onto guy asleep on toilet. Fire alarm sends usher into theater. Click cone machine, which has shorted out. Woman runs out, slips on cone. Click red light dome on ceiling to kill usher.