A mouse, that's right a mouse, grounded a British Airways jumbo jet before a flight from London to San Francisco. Nearly 300 passengers were in their seats on the Boeing 747 and ready to leave the airport gate when the mouse was spotted.

According to the BBC, The crew told passengers planes cannot take off with mice on board, and that another flight would be scheduled. A new plane that was on standby had to be brought in for the flight. Passengers eventually left London for California about 4 hours later.

Passengers found humor in the situation, but the airline is not laughing about the incident. It could face hundreds of thousands of dollars in fines for what is being called a preventable delay.

The social media reaction to the issue was swift (and clever):