Insanity and Explosives

"What The Fuck Was That?!" Shouted Sera.

Frank seemed oblivious of her problem. He just had a dumb expression, not understanding why she was shouting.

With a large exasperated sigh Sera turned away and grabbed one of the strange metallic balls. She held it with two fingers, fearing it would spontaneously explode. The ball was small, its diameter about 5 centimeter.

While she was carefully examining the explosive device, Frank just stared at her like she was an idiot. He walked to the pile of balls and grabbed one as well.

He was much less careful with it. While Sera was terrified it would explode for no reason, Frank just tossed it up into the air and caught it like it was a regular ball.

Each movement caused Sera's heart to skip a beat. After a few more throws she finally had enough.

"Could you stop throwing that device into the air?" Frank zoned out while tossing the ball up and down, but when Sera spoke he perked up.