Thanks to Neil Gaiman's journal site, we have this link to a news story about a radio station that had its listeners sit on blocks of dry ice in order to win money. Corresponding entry in Gaiman's journal is from Friday, January 24, 2003 (that's the exact date format used there, and can be searched on) and is the second entry down for that day.
*gawps* They ... had them ... sit on....
OW!
*gawps* They ... had them ... sit on....
OW!