Viper is a new drug sweeping through Sunvale City like a plague.
The high is euphoric and intense but brief. Addiction is inevitable.
Abuse of viper causes odd scale-like formations on the user's skin among other side effects. The bodies of overdose victims tend to be found twisted and broken by the horrific final throes of viper poisoning.

D.A.R.E. to JUST SAY NO, kids!