Highly embarrassable people think that they blush more frequently and more conspicuously than others...

Nobody can edit the accounting spreadsheet until you unprotect it.

Errors of this type can be caused by a faulty instrument, the misoperation of an instrument, or by using an instrument in the environment for which it was not designed.

When we weren't blue lighting, we had to obey the 30 mph limit, but out of town we had a training exemption from any speed regulations and were encouraged to push the car to its limits... and we did.