Some call it being on a swirl. After swallowing the drug, the music begins to throb louder. The room spins faster. The lights dance, faces blur, and all inhibitions suddenly are lost. "It's like a hypnotic sedative. It's basically like being really, really drunk -- but a different kind of drunk," said a 21-year-old former UNC-Chapel Hill student who spoke to The Daily Tar Heel on condition of anonymity. The student, who will be referred to as "Mark," said he has taken the drug between 10 and 15 times -- usually pouring it in a glass of water or a Red Bull energy drink.