Sitting in seat 1A on UA 4264, I saw a younger passenger board and ask the flight attendant if he could speak with the captain.
When she asked why, he said he had around 10,000 hours of Microsoft Flight Simulator experience on the E145 and offered to help the cockpit crew if needed.
The flight attendant handled it professionally and told him the pilots were fine and did not require assistance.
It was one of those unusual moments that makes you realize what flight crews deal with sometimes.