i can't speak on the rules for zmod but here's how it happened:

there were 4 players in a nook beside the stairs in the bow of the ship, first level below the deck (near the container with a van, 1 level down). i know there's a rule about how many people are in a crouch spot (right?), however this spot is tall enough to stand in (although all players are crouched). ferret runs in and joins, not breaking any cades or anything, batman warns that he'll slay saying 4 is the limit for that spot, then slays. i'll let those with more knowledge in zmod determine whether or not 4 people is indeed the limit there or not.