Switching on the machine's power unit, Barry took a step back as the silver sphere began to hum with vibration from the harmonics regulator and lift off the concrete floor to hover a metre in the air.
The cables and wires attached to the docking cradle held the sphere from rising much higher and Barry's eyes widen with delight as the vibration waves became visible around the curve of the orb's surface.
The humming from the machine grew as did the vibrations, until the entire sphere was a silver blur that began to fade in and out of vision.
It was working.
Barry quickly scanned his laptop screen and saw that all the output readings were within the optimal limits, finally; after so many failed attempts he had finally fixed the stress level harmonics and brought them into alignment. And now, his machine was actually working!
Looking back to the fading sphere, he saw it dissolve right out of existence and leave only a void where its silver shape had been.
The hum stopped abruptly and for a few moments, all sound seems to be sucked out of the room, leaving only a pure silence, devoid of any noise save for the sound of Barry's own breathing in his ears.
Then, with a pulsing wave of air and sound, the sphere reappeared and hovered peacefully where it had been only a few moments earlier, a layer of frost crackled on its surface.
After a moment of hesitation, Barry took a step toward the machine before a figure of a man popped into being right in front of him.
It was him, another Barry; only this one was dressed in what looked to be a well-worn, leather motorcycle outfit and sporting an eye patch over his left eye that hide a long, jagged scar.
The other Barry also looked tougher somehow, harder. Perhaps it was all the spiked studs adored his leather outfit, or the rugged beard, or more than likely, the homemade-looking rifle slung across his back.
In any case, this Barry seemed to mean business, and he came at Barry shouting.
"You have to shut this machine down, you fool!" Tough Barry yelled and he closed in on him, but even as Barry quickly stepped back to get away from the crazed version of himself, Tough Barry seemed to make sure not to come close enough to make actual contact.
"You hear me!?" Tough Barry shouted again. "Tear the machine down or everything and everyone we knew and love will be destroyed!"
Barry felt himself hit against the work bench and he reached back to the machine's power unit as Tough Barry continued to shout at him to turn it off.
"Okay." Barry stammered as he found the switch and flicked it off.
Instantly, the hovering sphere dropped back into its docking cradle with a metallic clunk and the other Barry popped out of existence just as suddenly as he had shown up.
Barry sighed with relief as his cluttered basement workshop was quiet once more.
Well, that was a close one, he thought to himself as he began to disassemble the wiring connection of the machine's main power supply.
When a crazy, alternate-timeline version of yourself comes from the future to tell you to shut down your time machine, you listen.