"Don't you worry. We'll get away from him."
Glora and Alan had almost reached Dr. Kent's size before their excited fingers could get out the vials. They took some of the diminishing drug to check their growth. Alan handed his father a black vial.
"No! Wait, that's the wrong drug. This other--"
Dr. Kent had opened the vial. His trembling hand spilled some of the pellets, but none of them noticed it.
"Father, this one." Alan held an opalescent vial. "Take this one."
Glora said abruptly, "Listen! Is that someone coming?"
They thought they heard approaching footsteps. A moment passed but no one came into the room.
"Hurry," urged Glora. "That was nothing. We're waiting too long."
As they were about to take the diminishing drug a very queer sound came from across the room. A scuttling, scratching, and the drone of wings.
Over by the wall, a giant fly was running across the floor. The fly had eaten some of the sweetish powder.
A few drops of water lay mingled with the drug on the floor. And from the water nameless hideous things were rising!
To Alan the first moments that followed the escape of the drug were the most horrible of his life. The discovery struck old Dr. Kent, Glora and Alan into a numb, blank confusion. They stood transfixed, staring with cold terror at the fly which was scurrying along the floor close to the wall. It was already as large as Alan's hand. It ran into the corner, hit the wall in its confused alarm, and turned back. Its wings were droning with an audible hum. It reared itself on its hairy legs, lifted and sailed across the room.
As though drawn by a magnet, Alan turned to watch it. It landed on the wall. Alan was aware of Dr. Kent rushing with trembling steps to a shelf where bottles stood. Glora was stricken into immobility, the blood draining from her face.
The fly flew again. It passed directly over Alan. Its body, with a membrane sac of eggs, was now as large as his head; its widespread transparent wings were beating with a reverberating drone.
Alan flung a bottle which was on the table beside him. It missed the fly, crashed against the ceiling, came down with splintering glass and spilling liquid. Fumes spread chokingly over the room.
The fly landed again on the floor. Larger now! Expanding with a horribly rapid growth. Glora flung something--a little wooden rack with a few empty test tubes in it. The rack struck the monstrous fly, but did not hurt it. The fly stood with hairy legs braced under its bulging body. Its multiple eyes were staring at the humans. And with its size must have come a sense of power, for it seemed to Alan that the monstrous insect was abnormally alert as it stood measuring its adversaries, gathering itself to attack them.