During an emotional breakdown, Kaj produces some sort of psionic backlash and causes Jax Pavan's room to vibrate with power. The results would have implicitly been catastrophic if he hadn’t been calmed down.
Jax had turned and started for his room when every hair on his body stood on end. Something was happening within the confines of his room—something so anomalous he couldn't grasp it. He had heard a blaster overload once—had heard the sound of it grow from a staticky buzz that made his teeth itch to a piercing whine that threatened to remove the top of his head. This was like that, but it was in his brain, in his bones, in his blood.

It was a buildup not of sound, but of the Force. Jax leapt for the door to his room and flung himself inside. Kajin Savaros lay in the middle of the floor in a fetal position, hands to his head, eyes squeezed tightly shut, rocking back and forth while the Force built up within him like water behind a dam.

In all his years of training with Master Piell, in all the time he had been on his own, Jax had never encountered anything like this. He had no idea what to expect, no idea what to do. On the opposite side of the room the items atop his storage bench began to vibrate. Even as he watched, a hairbrush, a chrono, and a book of Caamasi poetry jigged their way to the edge and fell.

Jax was in motion again before they hit the floor, pushing the Force ahead of him as he dived for the writhing teenager. He wrapped Kaj in soft folds of the Force, projected soothing, velvet calm. Then he grasped the boy's shoulders, his grip firm but gentle. He felt a backlash almost immediately—a kick like a repulsor field. He pushed back.

A bottle of depil cream abruptly cracked, its viscous contents oozing free.

“Kaj” Jax said, then more sharply, “Kaj! What's wrong?”

The boy let out a wail that penetrated all the way to Jax's soul. “Alone…alone!”

Grasping at straws, Jax said, “You're not alone, Kaj. You have me now. You have Dejah and the others. You have the Force.”

“The—Force—is doing this—to me!”

Star Wars: Coruscant Nights III: Patterns of Force: Chapter 11