What does k2 smell like when burning?

K2, often referred to as synthetic marijuana, has a varied and often unpleasant smell when burned. Users often describe it as having a chemical, acrid odor that can resemble burning plastic or rubber. The scent can be harsh and overpowering, and it may cause irritation to the eyes and throat. Overall, the burning smell of K2 is generally considered unappealing and distinct from natural cannabis.