A guy gets into work late one day, clearly upset.

His co-worker asks him “Hey Jim, what happened, man? Why are you late?” “I got a flat on the way in. Cost me at least an hour dealing with it,” Jim grumbles. “How’d you get a flat?” “Eh, I ran over a bottle in the middle of a crosswalk.” “In the middle of a crosswalk? Didn’t you see it?” “Nah - damn kid had it under his coat.”