A SN flight had to return to (I believe) BRU after a deranged intruder broke into the cockpit and attacked the F/O during meal service using the time the F/A opened the cockpit door to serve the flight crew. Was this a terrorist trying to hijack the plane? Was it a drunk passenger upset the flight crew cut him off? No, it was the pilot's cat that escaped from his kitty carrier and wasn't too happy about being cooped up in there. The flight returned to the airport and resumed after the offending weapon of mouse destruction was offloaded.
Just thought this would liven your day.