I was driving and suddenly heard a loud explosion on the top of me, then i saw a my sunroof cracked. i stopped to check on it and i continued driving for about a mile until part of the sunroof blew off and hit other cars. nothing hit the glass for it to brake, it simply exploded from the inside out (pressure-like explosion). dealer says it has no recall at the moment for my vehicle but while doing my research, i found out that audi car owners have had the exact same problem in the past with no resolution yet. chassis might cause extra tension on sunroof creating it to explode, or inside pressure is too strong for the glass to resist. sunroof and windows were up (closed) at the time of the incident.