Although glider collisions and puffer trains are not the real province of de Bruijn diagrams, some information can occasionally be gleaned from the diagrams. For instance ``black hole'' configurations are often interpretable as collisions. Just manually adjusting the coexistence of A and B gliders, it looks like they should begin to collide in the generation9 de Bruijn diagrams. These are still within computational limits, being 16 times as big as the generation7 diagrams, but will involve millions of nodes.
However, two kinds of collision are easily described, and are discussed below. Besides the A  B collisions and the A  C collision converting into an F, there is the whole class of collisions by which B gliders extend the E or G gliders, but which has already been incorporated in the foregoing analysis. For A collisions, we can make the following table:

Similarly, a table can be constructed for B collisions:

Besides simple encounters, there is a multitude of collisions between glider polymers, and still more between closely spaced groups of polymers.