An iPhone 4 caused a major scare on an Australian passenger flight when it appeared to commence self combustion. The iPhone 4 belonging to one of the passengers on Regional Express flight ZL319 operating from Lismore to Sydney started to emit a significant amount of dense smoke accompanied by a red glow.
Luckily the aircraft had already landed when the incident started and a flight attendant carried out recovery actions which included extinguishing the iPhone. The incident has been reported to the Australian Transport and Safety Bureau (ASTB) as well as the Civil Aviation Safety Authority (CASA). The iPhone is also now in the possession of the ASTB for analysis.
Source: Rex Press Release, thanks Phil!