FWD guys

A while back I was driving my 93 Daytona Iroc R/T to work one morning got on it as I was starting up a hill and BOOM no more clutch.I pulled it apart the other night and this is what I found,4 puck ceramic disc had actually broke or exploded.I don't drag race it or run huge boost,just 12 pounds of boost.Any ideas on why this would happen?