John takes a little blue pill at a party. the next thing he knows, he wakes up in the middle of a field and cannot recall the night's events. what might the blue pill have contained?

The blue pill might have contained Rohypnol (flunitrazepam), more commonly known as the date rape drug. The drug induces disorientation, temperature fluctuation from sweating to shivering, and nausea after 10 minutes of ingesting the drug. The victim may experience difficulty speaking or moving, and then pass out. Effects of this drug will peak within 2 hours and can last to 8 hours. Such victims have no memories of what event occurred while under the drug's influence. Mixing Rohypnol with alcohol is hazardous, the effects of this mix are heightened and greater than the Rohypnol alone.

Carbon monoxide is usually more dangerous indoors.