How hard could it be?

We went to Friendly's last night for dinner, and while we were waiting for our sundaes I was reminded of another dining experience. Back about 9 years ago we were eating at an IHOP. I asked for a hot fudge sundae after our lunch. The waitress wrote it down and walking away into the kitchen, starting muttering to herself. "A hot fudge sundae. Now how do I do that?"