Honestly, I really almost want to applaud the Home Depot guy. I have had more than one whacknut experience with self-checkout machines. Is it really self checkout if an employee has to come over and perfom an exorcism everytime you use it? I have given up on said machines, and it's quite possible I'd just shoplift before being forced to use one again.

The other explanation is: the guy is a Luddite.