aterpster: please help, I might be being thick. I agree with the MORA altitudes but I don't see 10,000' you mentioned. Is it coincidence that 8700' can easily be transposed into 7800'? Easier to mis-read than mis-speak, perhaps, unless the speaker is thinking about the 7800' for some reason, and mouth doesn't co-ordinate with the correct part of the brain; i.e. it is thinking about 7800' and should be saying 8700', but the mouth connects to the wrong segment of grey matter.
Wive's & girlfriend's names get mixed up with each other, on occasions, but there is no EGPWS to save the day.