Did a Cree update to my 3 D-Cell Maglite a couple weeks ago. Wow!
Those "tactical" bezels just crack me up.
"Your Honor, I was in fear for my life, so I rushed him with my flashlight..."
"Son, why the hell didn't you just shoot 'em, since it would've been considerably less messy?" 
You get into a cell-to-cell charging situation with some lights that use 123a lithium primaries, cheap unprotected cells, and an un-vented flashlight body design, and you can practically "shoot" someone with the tailcap and a cell or two.
There's a few threads on Candlepowerforums where flashlight tailcaps have shot holes through drawers, or right through a sliding patio door and landed outside on the driveway etc.
Fortunately, it was always rare, and most cells are now protected with bi-metal protection disks that break the circuit if overheated, and even most cheap Chinese flashlights have a venting path somewhere in the body, switch, or bezel.
