Unfortunately and embarassingly enough, view-bob in first person games tends to give me motion sickness.
In other versions of jdoom/heretic/hexen (including ones as old as the one that kmod is based on, I think), you can turn it off by typing "toggle view-bob-height" in the console.
Though kmod doesn't list view-bob-height under listvars or respond to the toggle command. Is there anything I can do? I'd hate to let something so minor ruin my fun, and kmod sounds great.