"Are you sure you don't want another machine gun installed?" Doc paused over Vash's mechanical arm, soldering tool poised in midair.
"Hm." Doc considered, hiding a grin. "Let me try something…"
"What did he do?" Meryl poked at the interlace of synthflesh and metal.
Vash shook his head. "I'm not sure. He said you'd like it, though."
Her curious fingers found a depression near his elbow, and a tiny click sounded. Vash's fingers began to buzz, and he yelped in surprise, An enormous grin spread across Meryl's face.
"So that's what Doc meant about a 'secret weapon.'"