Here are some dicey situations we've seen more than once and what we wished we'd done about them.
Kent has a rolling suitcase whose wheels are too close together. When he is running between planes, the suitcase starts wobbling. Trying to hold on tighter to the handle just makes it wobble more. Eventually the stupid thing just falls over.
The solution, of course, is to buy a new suitcase with suitably spaced wheels. That wouldn't make much of a teaching story, though. Kent's solution is to slow down until the suitcase stops wobbling. It doesn't matter how late you are for your plane, if the suitcase falls over you'll be later.
Here are some common "wobbles," signs of trouble with planning, and what we do if we see them. The solutions ...