Went out to dinner with some friends last night. My chicken sandwich arrived without a top bun.

“Can I get you guys anything else right now?” the waitress asked.

“Could I get a top bun?” I asked.

She looked at my open-faced sandwich. “Oh, sorry!”

A minute later she was back with a top bun on its own small plate. “I swear,” she said before walking away, “This almost never happens.”