I once saw a humorous joke in a proverb, saying that a person's murder plan used many chemical principles. . He had better starve to death.

Sneak into the teacher's house first, put sodium hydroxide in the water container of the teacher's house, and then put ammonium nitrate in the water cup. Then apply white phosphorus to the exhaust fan. Turn on the gas to make it strong enough to catch fire, but not enough to explode. Finally, the door lock of the teacher's house was broken and could not be opened from the inside, and then a pot of all-purpose glue was placed under the window of the teacher's house (the teacher's house is on the first floor). The teacher jumped out of the window and starved to death.