Half-Life-Anomalous Materials

Arriving at the Anomalous Materials Laboratory, his usual place of work, Gordon dons his HEV Suit, as per routine. Continuing down to the lab, Gordon finds himself face to face with the people conducting his test; they inform him that they have a unique and large sample of anonymous origin, and that they will be deviating from normal procedure to accommodate for this.
Once in the test chamber, he goes to the control panel and presses the button to start the rotors on the excessively huge Anti-Mass Spectrometer suspended from the ceiling. Rising up from below, the sample arrives at last. "Standard procedure for a non-standard specimen," they assure him from above. "Go ahead, Gordon." Taking the cart in hand, he pushes it nonchalantly into the beam.
The scientists start screaming, telling him to stop, but drowning that out, the deafening sound of explosions, and flashes of green light. Then black. All that can be heard is the sound of his heavy breathing. Another flash of green, and he's on a strange alien world. Just within the pool of green light around him, odd-looking bipedal lifeforms stare at him, as if confused. Another flash of green and he's back in the destroyed test chamber.