This Glock 22 (.40 S&W) blew up while firing reloaded ammunition.

From AR15.com …

Was at the range with some friends today, and a friends glock 22 grenaded with some commercially reloaded .40. This brand is really popular up here for idpa and ipsc as well as plinking.

The trigger, mag release, and slide stop disintigrated, but were recovered amongst the rubble around the range. The head of the case was found about 20 yards downrange.
Also, the top of the chamber took a chunk out of the ceiling. not to mention the slide coming off of the rail on one side, and the frame being completely warped in that area.

his hand is alright, no cuts, but will probably be bruised soon.

[ Many thanks to jdun1911 for emailing me the link. ]