The street term "speed" is usually used for amphetamines, which are synthetic drugs that can be ingested, injected, or inhaled. Students learn that these chemicals are absorbed into the brain tissue and can affect the way messages are carried between nerve cells, including triggering signals when they aren't supposed to. The bad effects of speed are covered in this scared-straight approach to drug abuse, including the physical (weight loss, convulsions, stroke, heart attack, and death) and mental consequences.