Demi Moore’s frantic 9-1-1 phone call has shed more light on the night she had a seizure and was rushed to the hospital, and it may have also revealed the substance that she was smoking.

As RadarOnline.com previously reported, a friend of Moore’s can be heard on the call explaining to the operator: “She smoked something, it’s not marijuana, it’s similar to incense. She seems to be having convulsions.”

A likely possibility is that Demi was smoking K2 Spice, a “currently legal herbal incense product spiked with powerful designer drugs” that don't show up in tests, according to WebMD.