[quote=@Sarpedon]
the sort of grenade launcher that explodes in your hands is the sort of grenade launcher that wasn't maintained properly...[/quote]

Everything that happens is the Will of the Emperor.

Therefore, there is nothing one can do to prevent anything happening.

Therefore, if the grenade launcher does go pop in my hands, it's probably because I wasn't reverential enough. Now if you'll excuse me, I've got to do some self-flagellation to appease Him.