We eat on airplanes. Why not trains?
Rats aren't a problem on airplanes. They are a problem in the NYC Transit system.
Ask a stupid question time, get a stupid question in response.
Is everyone in the airplance seated with a tray? (Yup)
Do you get served your meal at take-off/landing; or do you get served once the aircraft has reached cruising altitude AND the air is smooth? (about 30 after take-off and at least 45 minutes prior to landing)
Why do you suppose they do that? (prevent spills)
Does a Subway reaching a cruising speed for more than a few minutes? (Nope) Is everyone seated? (Nope)
Do you now understand how foolish that question was?