Ummmh, this is not a blackhole glitch , is other glitch produced with the liquid nitrogen and C4... the C4 Absorbs the Liquid nitrogen when you put small groups of particles (sorry for bad english speaking, cause i am from chile ,Southamerica)
Also there are some bugs with 1 pix diamond walls. It is passed by other elements on some pressure (or without), like Neutrons.
thats also not really a bug: sometimes particles travel more than 1 px at the same time. that causes that they "jump" over any "Element-Wall" thats smaller than 2px. try using 2px of diamond. should work then