A bad week for United Airlines didn’t get any better when a creature thought to be a scorpion fell out of an overhead bin on a flight from Houston to Calgary and stung a passenger.

The incident actually happened on Sunday and the man stung by the presumed scorpion was treated for non-life threatening injuries on the plane and when it arrived in Canada.

United Continental Holdings Inc. (NYSE: UAL) confirmed the incident to CNBC.

Arizona is home to a large number of bark scorpions and about 100…