Yeah, it does. And it's also designed so that it takes 10 kilograms of pressure to detonate. Are you gonna rig up sideways launchers for each? Perhaps there already are remote detonators that you just replace the normal weight switch with.
But still. I don't buy it. First off why hang them so frequently, and do all the texts speak of charge PITS instead of "charge hooks"?
It just doesn't make sense to me and I just think OP has heard it from someone in real life and decided to believe it and is now spreading it here.
Unless someone can actually show these are for explosives, I just don't buy it.