Harry calmly walked down the hallway to go get dinner. He had been reading a book on Occlumency, and told Ron and Hermione he'd be down in a couple minutes. Ten minutes later, he put down the book and left the common room.
"Huh?" was all Harry had to say before the suit rattled and fell over, and a Dementor clawed its way out. Harry pulled out his wand, eyes widened in fright.
"R-Ridikulus!"
CRACK. The Boggart exploded in green light.
Dead Ginny.
"No! Ridikulus!"
CRACK.
A flash of green light. Dead Weasleys.
"R-R-Ridikulus!"
CRACK.
Sirius falling through the Veil.
CRACK.
Green light. Dead Ron.
CRACK.
Green light. Dead Hermione.
CRACK.
The Dark Mark, hissing and wrapping around him.
CRACK.
His Uncle towering over him.
"You know you can't touch me. Ridikulus!" His voice was stronger, but not enough.
CRACK.
Voldemort.
CRACK.
Screams emenated from the smalled version of Hogwarts as it burned to the ground, calling out his name.
CRACK.
"Hello, Harry!" a cold voice shouted as it jumped up from the floor. "How've you been!" Harry could only kneel on the floor in terror and guilt. "Glad to know you were willing to share the glory! To take me along for the ride! Good to know I was a spare, just Voldemort's first victim!" Cedric yelled as he towered over him.
"Cedric..." Harry whispered. "I didn't know... I didn't know the cup was a Portkey, I-"
"A spare!" he yelled again as Minerva and Dumbledore came sprinting down the hall. Minerva shooed away the approaching students while Dumbledore drew his wand. "I was just that! A spare! I hope those words haunt you for the rest of your life, Harry. Kill the spare! Kill the spare. Kill. The. Spare. KILL. THE. SP- " Boggart Cedric stopped as Dumbledore shouted: "Ridikulus!"
"Listen..." Harry stopped and looked up at Cedric, who seemed a lot nicer then a moment ago. "I owe you one for telling me about the dragons. You know that golden egg?"
"Wha..."
"Does yours wail when you open it? Well... Take a bath, and - er - take the egg with you, and - er - just mull things over in the hot water. It'll help you think… Trust me."
Minerva had paused from her duties and looked at the Boggart with sadness, as did Dumbledore.
"Tell you what, use the prefects' bathroom. Fourth door to the left of that statue of Boris the Bewildered on the fifth floor. Password's 'pine fresh.' Gotta go… want to say good night-"
"Ridikulus," came a hoarse voice, and the jet of light from Harry's wand made the Boggart disappear into smoke. Harry slowly stood up, ignoring everybody. His face was covered it sweat and tears. "I think I'll ask Dobby to get some dinner for me later," and he turned and disappeared around the corner.
I wanted to speculate on what Harry's Boggart might be after book five. Not sure why. If you can think of a better place for a Boggart to be than a suit of armor, then let me know. My brain isn't functioning and I couldn't think of anywhere else to put it.
Web of Obsidian