We have a hole in the wall at our track from just the same thing. A Turbo 35 didn't peak and kept charging. We could hear some cracking noise and looked around for what it was. It was installed in a car at the time when it let loose. Sounded like a shot gun going off. We taped off the hole and the driver signed it.
the guys were very lucky they were not in the trailer. We were in the drivers meeting at the time. We heard it in the other building!
I was banging on the side of the trailer all week to keep them on their toes... Just couldn't do it again after that!
BSR Racing Tires