All you can eat

It had long been his favorite restaurant, and Rock was there with his mother, seated at a table with a view of Lake Hamilton.
On this occasion, however, he felt they had waited a bit too long for a server, who looked embarrassed when he finally arrived. "I'm so sorry, but we have a new policy," the server said. "If you're here for the all-you-can-eat buffet, you have to wait in line."
Rock turned to see fifty or more people gathered outside. "Oh, our mistake," he said.
After they walked out, Rock assumed they would go elsewhere rather than wait, so he walked to his car. Once there, he looked back for his mother, but she was out of sight. He walked back toward the restaurant and saw her exit from a door to the kitchen with two large plates of ham and fried eggs.
"Rock, if we go back to our table, these will make it look like we've already been served," she said.
"You know what, I don't think that will work," Rock said. "But I admire your effort."