Touche'. Instead of a handshake, perhaps a horse-collar tackle for Dan-the Man?
Kidding aside, I've always admired Marino. They can't sign every autograph and be the lovable, jovial individuals we wish they could be at all times. Keeping your experiences in mind, I'd still welcome him, shake his hand and tell him how big of Bills fan I am and how I enjoyed the battles over the years.
......finally sending him off with the 'ol Bryan Cox salute.