As it is Marty's birthday this week they were looking forward to seeing Joe Satriani, (Marty's first official concert too!) one of the closing acts.
However, that was not to be as a big storm blew in and literally blew down the stage while Cheap Trick was playing. The grounds were quickly evacuated and that was the end of their special weekend. (You can click the link above to read all the details.) It is most fortunate more people didn't get hurt.
Oh, and the teeny tiny fine print on the tickets says there are no refunds for "acts of God, among other things." That too is most disappointing.