Stuck - Part 2 (Story + render set)

Now that the sensors were attached I  left Colby on the platform and went over to the console that control the equipment.

"Ok, here we go, stand still" I typed a few commands into the console and pressed enter.

"LOWERING REINFORCED GLASS" said a female mechanical voice through the speaker.

"Wow, this is sci-fi stuff" Colby said as the glass tube lowered, surrounding him until finally touching the platform on the ground.

"SUBJECT CONTAINED" 

"Is this really necessary? I'm not going to run away" Colby looked worried.

He placed his hand on the cold glass and examined it all the way to the top.

"We have to have you contained for the procedure. We can't have gas leaking outside. Relax, this is totally safe". I reassured him.

"I'm going to start releasing the gas bit by bit. Breath normally please."

I typed the command on the console and launched it.

"RELEASING GAS" said the mechanical voice.

A small valve opened at the top of the reinforced glass and I could hear the faint hiss of gas coming into the glass tube.

"It smells funny, it's kinda like fresh donuts" Colby mentioned.

"How are you feeling?" I asked him.

"Pretty normal.. oh wait my fingers are tingling" He held up his right hand and slowly twiddled his fingers.

"The tips of my fingers are little bit stiff."

"Excellent!" I exclaimed.

A few moments had passed...

"You know, it's starting to get a little bit warm in here."

I looked at Colby, and saw a growing bulge in him briefs.

"Is this supposed to happen? I'm getting all aroused..." Colby said.

"I'm sure it's nothing out of the ordinary, maybe you are genuinely turned on.." I joked but really had no idea why he was getting an erection.

At this point his dick was erect enough to peek from his briefs.

"Tell me what you're feeling Colby"

"Fuck man, I'm getting horny as hell. I don't know what's going on" He looked down at his rising cock.

"How's the movement?"

"It's getting kinda stiff all over. it's getting hard to move.. ahhhh.. what's in this gas?"

"Just continue to breath normally" I told him.

I noticed the sensor on his groin was changing from yellow to orange, showing increase activity and blood flow. The other sensors were actully turning to a shade of blue, indicating decreased activity. I had no explanation.

"ahhhh doc.. I feel like I'm going to burst". Colby exhaled and slowly pulled down his briefs.

"Oh oooooooooooooooohhhh.. I'm gonna cum, I'm gonna cum, I'm gonna c...."

He didn't came. The lights on the upper and lower sensors were dark blue - signaling complete shutdown, but the going sensor was going crazy with bright red light. My guess was Colby was stuck in an orgasm. His right hand stuck trying to reach his cock, and give it that extra thrust he needed to go over the edge.

This wasn't anything I was prepared for.

"SOLIDIFYING COMPLETE" called the machine, and I couldn't here the gas hiss anymore.