This incident has reminded me of a former co-worker who was having his house valued for sale by two estate agents.

After the first one left, he really needed a poo. So as the next wasn't due for an hour, went and did so. A proper "leave it 10mins mate" poo.

Unfortunately the NEXT estate agent turned up early immediately after, to his horror.

First one valued the house at £300k. Second one valued it at £250k

He'd done a shit so bad it knocked £50k value off his house...