Just a regular commute this morning to the subway (6 miles). I grabbed another bike this time. Yesterday, I had #1 Raleigh Competition GS, today I got my Schwinn Prelude. BTW, this happened when I was downtown. After finishing my breakfast downtown, I am riding on the super wide pavement real slowly, and all of sudden, I stopped moving! WTF!! I was going slow enough to keep my balance. I look back and down, and my rear wheel/tire got caught in a groove in the pavement. The groove was just the right size to let my tire/wheel slip in and stop it!!

Anyway, no damage to the tire or wheel, and I didn't fall.