Chad grabed a jar at random held it sideways under his arm, heading back to his bench. The rough movement jostled Mika out of his meditative trance and he was once again panicked and terrified. It felt like his coffin was in the middle of an earthquake. The jock had only taken the class to fulfill a humanities credit and had hoped maybe it would teach him ways to manipulate people to get laid but lost interest when he found out how much memorizing Latin names for specific sections of the brain was involved.
He plonked down his brain and started looking at what the guy with thick glasses next to him was doing. The nerd was examining the numbers on the front led display and was starting to prod the electrodes sticking out of it with a probe. Chad shrugged his shoulders and grabbed a electric rod and started to randomly poke at his own jar looking for a reaction. At one point he saw the brain bloated in size and thought that was pretty interesting and kept stimulating that area.
Inside the simulation Mika suddenly felt his world start the shrink. He had thought it was cramped in here before but now it seemed to be getting worse. Previously he only had a few inches of head and leg room; but now the coffin seemed to be closing in even more. He attempted to break out (an endeavor he had given up on long ago) but to no avail. Soon the lid was pressed up against his nose, the sides tightening against his ribs, crushing him even further. Slowly top of the coffin began pressing down on his erect boner, forcing it to bend uncomfortably. He almost forgot his predicament as for the first time in decades he felt actual physical contact against his horny yearning erection. This might be his only chance to finally cum. He thrusted against the hard wood and almost brought himself to orgasm.
Back in the real world the professor called ten minutes to the end of class. The jock was getting pretty bored now and decided to give the probe of extra boost of power to see if it did anything.
With a sudden surge the coffin constricted again, crushing Mika's balls painfully between his thighs. He was completely unable to move. The feeling of claustrophobia increased ten fold and now what little freedom he had was taken away from him. The part of the simulation that still forced him to struggle and thrash was still active but he could no longer satisfy that itch, not even able to raise his knees or his head. The wood against his face game him a constant suffocating sensation and the pressure on his dick and balls was painfully arousing. This would probably take another decade to get use to.
In the real world professor called an end to the class. Chad's mind was already thinking about lunch as he placed his jar back with the others. After sitting on a cramped stool for an hour he decided it would be nice to eat in the courtyard and stretch his legs.