5 Minute Freewrite - Prompt: Flash

He counted to five under his breath and crept out of the stall, walking towards the sink in case the other person hadn't actually left. When he spotted the swinging door, he spun around and darted into the third stall.

As he reached for the cover he felt a vibration in his pocket. Could be important... so he reached into his pocket and pulled out his phone. It was a notification from his custom android app. A new prompt had just been posted. He tapped the notification and a browser window popped up.

Flash, what could this be... The previous prompts were nouns or noun phrases. Sure this could be a noun, but it looked like a verb. What could it mean. Was it a warning, was it another clue? He didn't have time for this, he wasn't sure how much time he had exactly, so he stuffed the phone back into his pocket and pulled the cover off the back of the toilet. There was nothing there.

He dropped the lid back onto the reservoir just as he thought he heard the door swing open. He flushed the toilet and nonchalantly turned to walk out of the stall just as a small canister rolled across the floor.

Huh, that's odd, looks almost like one of those flash grenade- his thought was interrupted by the loud pop, the sudden flash, and then the room filled with smoke.