A1: PCP, http://en.wikipedia.org/wiki/Phencyclidine

The drug alters mood states in an unpredictable fashion causing some individuals to become detached and others to become animated. Intoxicated individuals may act in an unpredictable fashion driven by their delusions or hallucinations. Included in the portfolio of behavioral disturbances are acts of self injury including suicide, and attacks on others or destruction of property. The anesthetic properties of the drug cause violent individuals to feel less pain at the time and persist in violent or injurious acts as a result. Recreational doses of the drug induce a psychotic state that resembles schizophrenic episodes.

A2: super glue (快乾膠), http://en.wikipedia.org/wiki/Cyanoacrylate

If somebody had a chest wound or open wound that was bleeding, the biggest problem they had was stopping the bleeding so they could get the patient back to the hospital. And the consequence was—many of them bled to death. So the medics used the spray, stopped the bleeding, and were able to get the wounded back to the base hospital. And many, many lives were saved.