Reservations screwed up one day when I was left on my own to manage the front desk (I worked for a large hotel chain at the time) and two sporting groups arrived for the same rooms. When I explained the double booking situation, one man just got right in my face and yelled abuse until he went purple. Then when I had been able to fix the problem, the same guy patted me on the cheek like I was 7 years old and said "you're only a girl, after all - it's to be expected that you can't manage much". I'm no feminist, as you all should know by now, but that really ticked me off so I gave him a three AM automated wake-up call for his entire stay there using the TV in his room as the alarm. Not only was it loud, it was also using hardcore pornography as the alarm channel. Cost him a fortune when it came to check-out time as no one would believe he hadn't opted for it himself. Happy days...