Here's what comes to mind:
At check, he let's a little old lady in front of him. But when he gets to the agent, agent goes on break.
At security, he gets the full search.
He misses the upgrade to the lady he let in front of him in line.
He agrees to swap seats with someone else. New seat is next to a loudmouth. New seat has broken tray table. Person he switched with gets the last meal choice available. No more food.