He swallowed. The deed was done and there was no turning back now. He stood for a few moments, wondering which of them had taken the wrong pill, before noticing his pulse had slowed. Sherlock panicked slightly as he realized he was going to die. It must have shown on his face because the cabbie began to smile cruelly.
"You lose, Mr. Holmes."
Sherlock's vision throbbed as he could feel his organs shutting down. "Nnn," he managed as a vile wave of nausea overwhelmed him. He fell forward onto his knees in the classroom, and then he vomited. It was too late to save him, however, as his vision swam. He fell backward, fighting the grip around his heart. The cabbie laughed as Sherlock fought his way through tunnel vision, his mind screaming at his own stupidity. He forced himself to breathe, feeling like he was drowning. There wasn't enough oxygen in the air to sustain him. His throat tightened and then he gaped like a fish out of water, terrified, but there was nothing he could do. Blackness closed in and Sherlock Holmes was dead.