When I was a detective and smoked nasty-smelling cigars (much to the chagrin of several other detectives there), I made the mistake of leaving a box on my desk. Later, taking one out and lighting up, the damn thing exploded. One of the other detectives loaded it with tiny firecrackers known as cigarette loads. His mistake was letting me know he did it.
Two can play that game. When he left his cigarette pack on his desk, I loaded one, skipped one and did the next two with the tiny firecrackers, knowing he’d look for and find the first one. He was happy, thinking he’d outwitted me (and I promoted that idea so he wouldn’t search for the other two). We went to lunch later with the Texas Ranger captain. As luck would have it, that detective sat right across from the captain. After lunch, he lit up. Yep, it blew and sprayed black soot all over the captain’s clean pressed white shirt. Presto, one pissed off Ranger captain scowling at a red-face detective. Of course, I played like I knew nothing. Needless to say, that detective and I declared a truce shortly afterwards.
My pranks didn’t stop there. New victim-detectives were chosen. More fun stories for another day.