Spooooky Story with an Anti-Climactic Ending

It's 7:00 at night on Friday, DEcember 28th. Alexis types on her keyboard in her cubicle. She'd always given everything she could to even the most miniscule of tasks. Since her report isn't done, she'll stay until it's finished.
it's dark. No moon, no stars. The floresant lights flicker on and off, making a monotonous buzzing. The wind kicks up and blows a bare tree branch aginst the large window next to Alexis's head. It makes a sudden, loud, scraping noise and she jumps in her seat.
Lightning. A large streak lights up the parking lot. She types faster. Her computer freezes.
"Son of a bitch!" She hits the side of her computer in a vein attempt to unfreeze it.
A bolt of lightning hits the power lines. Everything goes dark. She turns around to face the opening of her cubicle.
The sound of wind blowing through the 100-year-old building like the sighs of thousands of lost souls.
Lightning flashes. A dark figure runs across the opening of the cubicle. Alexis gasps.
A loud bang. She runs out into the twisted corridor, wondeing with every step, what lies behind the flimsy walls. Footsteps. Getting louder. Alexis, always somewhat of an athiest, begins to pray. To whom she doesn't know. Why, she is araid to imagine. Footsteps. Getting louder, still. Her legs go numb. She falls. Can't speak. Can't cry. Can't scream. She closes her eyes tight and wishes it all away.
Hot beath on her neck. She can hear it breathing. She whimpers.
"Excuse me," It's talking. An ancient, cracking voice. "You dropped you pen." It places it in Alexis's hand. The lights come back on.
On Monday, she quits.