Things can get pretty hot at altitude - just watch the antics on Pan Am, or ask anyone who's tried to join the mile high club.
But there's steamy, and then there's downright scary when it comes to airline excitement.
A passenger with the hottest new mobile phone, the iPhone 4S, got a stratospheric scare when the phone started emitting a significant amount of dense smoke and a red glow during flight.
The passenger was flying with Australian regional airline, Regional Express (Rex) from Lismore to Sydney on November 25.
The flight attendant carried out recovery actions immediately and the red glow was extinguished. Though the passenger was not doubt a little flustered, all passengers and crew on board were unharmed.
The matter has been reported to the Australian Transport Safety Bureau (ATSB) as well as the
Civil Aviation Safety Authority (CASA) for investigation and directions.
The Australian reports that CASA has previously spoken of concerns about problems with lithium-ion batteries on flights.
The mobile phone is now with ATSB for analysis.
It's not the first complaint against the safety of an iPhone. A lawsuit brought against Apple for its previous iPhone model, the iPhone 4 after the touch screens apparently shattered too easily.
Lithium batteries are a known safety problem during flight, and are listed as a dangerous good by the International Air Transport Association.