Cherrel was hiding in the back of a black truck as she tried to figure out how to deal with the guards in a nearby building.  They were alerted when the prisoners escaped, and were watching the security cameras.  Maybe she could use the crystal somehow.

She knew that she could create a bright flash of light by vibrating the air.  That should stun them long enough to grab their keys to this truck and allow her to drive away.  She'd get to Vegas and tell the cops about this place.

She grabbed the side of the truck and jumped over.  The guards saw her and started yelling for her to stop so she knew she had to hurry.  She concentrated on energizing the air in her hand and lifted her hand up to eye level.  There was a bright flash of light and a loud boom as the air exploded in her palm, burning it.  The men screamed in pain and grabbed their eyes, falling to the ground as she grabbed her wrist, reacting to the pain in her palm.