A concert at a Connecticut amusement park turned into what police are calling a "mass casualty event" Saturday night after several party-goers collapsed from drug overdoses.
Four people are still in the hospital.
Authorities are blaming 2CP, a powerful new synthetic drug that causes hallucinations and Molly, a powdered form of ecstasy.
Molly is the designer drug, popular with celebrities, that is responsible for two deaths at the Electric Zoo music festival in NY earlier this month.
So, what makes these the new hot party drugs?
Outfront: Dr. Drew Pinsky, host of HLN's "Dr. Drew on Call."