Just had one last week.
Was going to work on the 401 just past Kipling.
I ran over something. I heard it under the front tire, and then the back tire hit it and picked it up and threw it and it bounced around the tail section of my bike.
I thought, that wasn't good. And then I though about how stupid I was to not have see the thing.
Right away, I thought I was going to get two flats, but kept riding.
I kept shaking the bike to see if either was going flat.
Third time I checked, I felt squishyness from the rear.
Damn, I had to get off the 401 quick.
By the time I got to Weston Rd. it has lost almost all of the air.
I had to wait for the light to turn green, at which point it was completely gone.
Limped into Canadian Tire lot, parked it and called the wife to come get me so I could go home and get tools.
Took the rear wheel into Rosey Toes, just around the corner, and on my merry way.
Thank God for Ted.
It was a large gash, could not be salvaged, don't think I would have wanted a repaired tire on my bike anyway.
Luckily I had a spare tire at home.