Sarin is a very dangerous chemical that can hurt or kill people.
Sarin is a very scary thing that can make people very sick or even die.
Examples:
The soldiers were hurt by sarin gas.
Sarin is a very bad thing.
The sarin made many people very sick.
I don't want to be near sarin!
Sarin is so dangerous, it can hurt a lot of people at once.
The sarin was so bad, it made everyone run away.