Morcant felt a surge of urgency and alertness from Gurin, the mind-linked dwarf, as soon as the door slammed shut. Morcant quickly cleared his mind of any controlling thoughts. This was a situation which the dwarf would need his own expertise and no outside influence.
Morcant attempted to put his talents to work replicating Gurin's earlier work. He reckoned the opening of a hidden passage couldn't be that difficult - especially if a dwarf was successful. What he failed to take into account were Gurin's decades of training and expertise with traps, locks, doorways, and dwarven construction techniques.
Gurin wheeled around, eyes fixed on the chain jerkin and the place where it just was. Something there had triggered this trap. Gurin couldn't discern an apparent trigger but suspected a pressure plate system. He yanked the jerkin from Marlit's hands and placed it back where he assumed it belonged. Oddly enough, it seemed as if the sands began to pour faster.