“Whatcha found there?” Mal asked, stepping up next to him.
“Three duds.” Jayne informed the captain, holdin’ up three crackers that hadn’t gone off.
“You sure they’re duds, Jayne?” Zoe asked as she joined the pair.
“I know duds from live fireworks.” he scoffed.
As he turned to the bonfire, he didn’t notice Mal gesture to Zoe. They both backed away as Jayne tossed the trio of what he thought were duds into the flames. A loud bang echoed through the night air and Jayne began furiously patting out small areas of his clothing that had caught some sparks. After he’d put himself out, Mal went back over to him.
“Not duds, then.” Mal teased.
Jayne stood, his face sooty, his expression one of mild shock and confusion.
“Huh. They was live. I was sure they were duds…”
-- 'Splainy Unkie Jayne 9 - Pretty Lights And Loud Noises by LucasHarper