Ben decides to wait for Tom to return and get the drop on him when he opens the door.
Standing against the wall and pressing his back in to it he smooth latex shoulders press firmly against the cold metal. He waits for Tom to return for several minutes.
The latex change is moving over him slowly. He can feel it as it spreads down him. A tightness at first and then a cool sensation as his skin turns to rubber and conducts heat more easily. A pinching sensation in his crotch alerts him to the progress of his transformation and he looks down to see his enlarged donkey penis begin to become smooth. The sheath loses its fur and his balls become rounder and shinier. Soon he is covered with latex in his entire groin, and feels his donkey tail behind him start to change. The sensation of having a tail, and extra appendage, was something he was almost accustom to, but not it felt odd again as it became smooth and hairless. It made a squeak as he shifted his weight and it moved against the wall. He found he could still swish it around behind him by flexing muscles he only recently had, but it felt different moving through the air with no fur on it.
His reverie at his changes was interrupted by a sound of the door unlocking. A little click and then a bang as the heavy latch slid aside and the door swung open.
Tom strode in to the room and stopped the instant he saw the empty table. Too late though, Ben was already moving.
Slamming the door shut with his shoulder he thrust himself at Tom with his entire bulk knocking the man from his feet.
In a heap on the floor Tom had about 2 seconds to struggle before Ben grabbed a handful of Toms hair with his shiny smooth hand and gave a good push to smack Toms forehead in to the floor.
The strength left Tom almost instantly as he began to lose consciousness. He made a croak of alarm, a yell that was pent up in his lungs but to slow to emerge. Then he went limp.
Todd took his chance and flipped Tom over looking for the keys to his prison.