Hoping to get somebody’s attention, you bang on the door to the stairwell until your hands are sore.

When nobody answers, you start yelling and jiggling the door handle.

Finally, the door opens, revealing one of your coworkers, who looks at you in surprise.

“What are you doing in the stairwell?” he asks.

“Waiting for you to open the door,” you say.

You push past your coworker, mutter your thanks, and walk briskly away to avoid answering any further questions. Before you reach the end of the hall, however, you hear a loud buzzing noise behind you.

Heart pounding, you turn around and freeze at the sight of an enormous mosquito flying toward you. For a brief moment, you wonder if the stairwell's laced with a hallucinogenic toxin. As the giant mosquito gets closer, you snap out of your daze, turn around, and start running.