Matloff's left rear wheel broke off and embarked on a potentially dangerous odyssey.  It rolled at a fairly high speed RIGHT AT ME!  I didn't get a picture as it was near the end of the practice session and I was checking photos.

Still aimed at me, it easily bounced over the tire barrier and landed on the platform that Speedvision had set up to video the Corkscrew.  If Speedvision's gear had been in place the wheel would have bombed through it like a cannonball.  Then the wheel took a "funny bounce" and aimed itself away from me; it flew directly at the flagman stationed next to Speedvision's platform. 

Luckily for him, it landed flat rather than on edge, bumping but not injuring him.