Two Story Restaurant Waiter~

So I got this job at a restaurant that was 2 stories tall. I worked for 3 days hulking trays full of food and drink and then dirty dishes up and down the stairs. And then I noticed some of the other waiters pointing and laughing at me. At first I though something had fallen off my tray. Then this the manager took me aside and explained that they have a little elevator that takes the food trays from the kitchen upstairs to the seating area downstairs. And I had been slaving with trays using the stairs the whole time. Boy, was I a dumbwaiter.