Acrophobia: Fear of heights.
His head feels so light, he can't imagine that any blood is finding it's way to his head. Air rushes in bursting gasps from him chest, and he hears himself whimpering with each breath. His fingers claw at the railing, his eyes fixated on the ground 50 floors down. "Reid, come here. It's okay, man." He hears Morgan's voice as if he is underwater, and his brain can't make himself move back. His jaw is so tightly clenched that he doesn't know how to open his mouth to even reply.
A hand gently touches him then, and the reaction is sudden and involuntary. He screams a blood curling scream, and he can see himself being pushed over the railing and falling onto the concrete below. He can feel the wind rushing past him, and his body breaking and splattering on the ground. People standing around his broken body, eyes wide with shock as his blood seeped from his shattered skull.
His fear was irrational, and he can't even think of a good reason that caused him to fear heights. Ever since he'd been young though, he remembered looking over the edge of his bunk bed and crying himself to sleep at night. He remembered his dad coming into his room, telling him to shut up and grow up. When he'd explain to him about how his bed was too high, his dad would make him lean over the edge. He'd make him lean all the way off the side of the bed and hold him by his legs.
The memory made him scream again, even as Morgan grabbed a hold of him. Just then, Hotch and Rossi came running through the door that led to the stairs. They lowered their guns at the sight of Morgan holding him down on the roof.
"The unsub jumped off the side, and he tired to take Reid with him," Morgan explained as Hotch approached cautiously. Rossi hung back, looking on quietly. "I need your help, Hotch," Morgan said again, and together both men lifted Reid to his feet. The younger man wouldn't walk, so they had to drag him away from the edge. Morgan pushed his head forward just in time to save Reid from throwing up on himself. Hotch rested on hand on his bony back, looking over at Morgan grimly. Reid just kept making small noises in the back of his throat, his body going slack with exhaustion as his muscles relaxed.
The wind blew slightly and Reid shivered, his sweat covered body cooling in the brisk air. Morgan removed his jacket without thinking and wrapped it around Reid's shoulders tightly. "Take it easy, kid."
"Don't push me," Reid said weakly, his legs finally giving out from under him. Hotch and Morgan held on tighter, balancing him between them. Rossi held the door open that led back into the stairwell and they half dragged, half carried Reid back down to the ground floor.
Spencer made no sound, even as they carefully helped him into the passenger seat of Hotch's SUV. Morgan shut the door and looked at him Hotch, "Take care of him, please." Hotch nodded mutely and went around to get in the driver side. Reid sat completely still, his head resting against the headrest, his eyes barely open. The only movement he made was a twitch when the car turned over, and it troubled Hotch.
"Looking down, I just always see myself falling," Reid suddenly said, "And when I was younger, I had a bunk bed that I couldn't sleep in because I was afraid of going near the end to get off. I was afraid I would fall, and no one would catch me. My mother was too ill to help me down some days, so I slept on the floor."
Hotch swallowed thickly as he turned out of the parking lot, "You don't need to worry about not having anyone to catch you, you'll always have us now."