Okay, this is dark, and short, but it wanted to be written. Just bear with me, please. Oh, and feedback would be nice... thanks for reading.
Steve reached into his mouth.
Gripping the capsule in his fingernails, he pulled it from the empty space where one of his wisdom teeth had been pulled months before. (He remembered that. He wasn't supposed to. A patch on the back of his neck had immobilized him, and an IV line fed tranquilizers and painkillers into his bloodstream, but his metabolism had broken them up, burned them out of his blood. It had hurt. It was too strange, to be in pain like that and yet physically incapable of screaming.)
He stared at it, and it seemed to be winking evilly back at him, its glossy coat like a milky, unseeing-yet-aware eye.
He wanted to yell, to scream, to crush it into powder, into fluffy gray dust, but he couldn't. It was filled with the most virulent substance SHIELD had been able to concoct, and he could not risk it getting into the city's water supply. Even diluted more than a million times, it would still cause people—living real actual thinking breathing people—to sicken, waste away, fade, die.
All he could think was How did it come to this?
All he could do was to slip it back into its space and resolve not to use it.
He was still screaming inside.