Maybe send him a pic of f1r3b1rd's leg after it got burnt from a mech mod. Not sure he wants to publicize that but it was really bad. Batteries definitely arent a joking matter.Sure seems like that situation would have done it, doesn't it? Maybe ask him how funny he'd think it was if that had happened when the mod was in his pocket? Maybe if he was in the hospital right now he wouldn't be so amused.
Dunno. People are just oblivious sometimes. Act like teenagers, think they're bulletproof. Sometimes the hard way is the only way they learn.