Classicly

A dark shadow fell over him. An opening suction-cupped down around him and clanged shut. Only then did the terrible force that held him in its embrace subside. Only then was he able to move freely and his first thought, his first action, was to snatch the small box from his pocket and pry it open with shaking fingers.

He couldn't let the invaders profit in any way from the sweat of Earthmen. He had to dispose of that precious capsule at once! But—how? There were only smooth metal walls around him; no holes, no ledges, not a single hiding place for it and no way to get it out of the ship!