I was reading through the Gherrit White term and I noticed that this passage:
"...and he saw the bars of the cell,
moving left and right, opening wide and then closing shut
like the surf coming up a beach. Every time that he thought
he would be safe, the bars crested up, the opening closing,
the wave rising, crashing. The result would be the same, he
would never escape. The bars would crush him, break his back."
Sounds sort of like some of the faster "crusher elevators" in M1 and MI. I can't think offhand of any in M2, though.