TORONTO — A Singapore Airlines freighter recently made an emergency landing not because it ran out of gas, but because it had too much of it.

The Boeing 747-400 freighter (Singapore no longer has 747s in passenger service), SQ cargo flight 7108, was flying from Adelaide, Australia to Kuala Lumpur with a crew of four and a flock of sheep. A cargo of 2,186 sheep, to be exact. Approximately 45 minutes after takeoff, the aircraft was forced to land in Bali Denpasar due to smoke alarms, not because there was a fire onboard but because of “exhaust gasses and manure produced by the sheep,” reports the U.K.’s Daily Mail.

The aircraft was able to depart again after 2.5 hours in Denpasar, and reached Kuala Lumpur about 2.5 hours later without any further incident.