What's so funny?

Lots of smiling faces as I dropped the faithful, old car at the garage for its annual check-up. I'm not sure if they are laughing with derision, expected income or the eternal optimism I hold for my beloved vehicle. We happened to bump into old friends there, an unusual place for a reunion. As I took this photo I caught sight of someone driving my car away, I thought someone had nicked it but it happened to be the eager MOT man, also laughing. I've got a bad feeling about this.