Amyl nitrate is the best substance in the world. It is sniffed, often at festivals..most likely kiss my grass, in high volume. Sometimes it is even sniffed in cinemas. It provides a rush to head, often referred to as a 'squeezing of the brain'. Signs some1 is using amyl: They are bright red, they giggle constantly, they are screaming'Turn the heater off, someone turn the heater off'