You think you know, so you try to speed the girls along

"Okay what the fuck was that!?" Megan yells, looking out of the store's doorway.

"Megan I-" You attempt to get her attention, but she is moving toward the emergency phone.

"Sis, that isn't going to help; we need to leave." Amanda again grabs her sister's arm.

"I don't know what is wrong with you or who that guy is, but I need to call my boss."

You clear your throat, tugging Amanda toward the entrance to the store. "Megan, I'm a friend of Amanda's, and you have to believe her. That sound," you emphasize with a gesture over your shoulder, "is from something we really don't want to meet."

"Listen, guy, I just got this job, and I'm not going to lose it because some idiot broke-"

Whatever argument Megan was going to try is silenced as her eyes go wide in shock.