Q: What is the process that makes the cell swell?

A: The overcrowding process.

By filling the cells with criminals, all kinds of criminals, from arsonists to murderers to rapists to white collar criminals, we overcrowd the cells, causing the cell walls to swell and strain, but hopefully not buckle. We wouldn't want the cells to break and the criminals to escape. We wouldn't be doing our jobs as prison guards.

Not that these jobs pay particularly well. That's we we have to overcrowd so many of the cells in the first place, to leave other cells empty. We make money on the empty cells, by renting them out to reality shows set in prisons.

Now cram the rest of block D into that cell. FOX has a new show called Celebrity Shanking and they need a location.